I don't think the issue is "smarts" in our cars/tractors/light-switches/etc but the lock-in and "authorized repair" bullshit.
On the topic of Smart Home stuff (which is the only topic I'm even slightly qualified to talk about) I've heard about people wanting "dumb houses" after initially people wanting "smart houses". It's my opinion that this desire is driven mainly due to bad experiences and doing smart homes the "wrong way".
What do I mean by that? Either they got burned by XYZ Smart company going under and all their cloud-dependant devices dying/bricking. they had a system like Control4 which required authorized resellers to make even basic changes [0], and/or they were overwhelmed with juggling 5 different apps/platforms that don't talk to each other. That doesn't mean smart homes are bad, just that the hardware/software was bad. I fully recognize that for the "normal" person the only options are currently "bad hardware/software" or "dumb house" but there _are_ better alternatives.
My philosophy for "Smart Home" is one of progressive enhancement (and graceful degradation). What that means is everything I "enhance" with "smarts" should still work the old way that people are accustomed to. Every light in the house can be controlled via "Alexa|Siri|Google turn off the Kitchen Light" but they can also be turned off/on by walking over to the wall and flipping a switch [1]. This means Smart Switches _not_ Smart Bulbs [2]. If my Home Assistant (yes, I'm one of those people) server goes offline, everything still works, the switches work, the door lock works with a key, the garage still opens. My "smart-ifying" of the house is not replacing the way to do something, it's only adding additional control.
In addition to that, and something that should come as no surprise, I refuse to use a cloud, or at least depend on a cloud for my smart home. For this reason I prefer Z-Wave/Zigbee devices. If the manufacturer goes out of business it doesn't matter (no pun intended [3]). While I can, and have, used cloud integrations with Home Assistant, I try to make sure that's just a stopgap to decide if I want to go all-in. I own a few Z-wave devices from companies that don't exist anymore and they have been chugging along without issue for years. I love that stability.
There is nothing in my house where you have to walk over to a wall tablet to control something or open an app on your phone, I would consider that a failure. Everything flows through Home Assistant, it's the brain, I don't want multiple apps fighting or different ecosystems that don't mesh (radio-wise or functionality-wise).
What does this have to do with tractors? Glad you asked! I see this as the same for tractors, they should absolutely be "dumb" with the ability to control/query parts of it and add the "smarts" through an external system. Whatever the equivalent of Z-wave would be for monitoring/controlling the device, not something built-in or required for functionality. A modular, non-locked-down system. I'm sure we are nowhere near that point but I write all this as a "don't throw the baby out with the bathwater", I think John Deere was wrong in how they went about adding "smarts" but I don't think the idea is without merit either. They went down the greedy, anti-right-to-repair route which is clearly wrong.
I'd love to see a combo of Ursa Ag's tractor as a base platform where smarts can be added to it without compromising it's repairability. A take on the "naked robotic core"-idea if you will.
[0] And each time you have a authorized reseller come out they try to sell you on an expensive upgrade because they make (most) their money on selling you stuff, not maintaining it. I really dislike Control4 and things like it.
[1] Point of clarification, I use Decora style paddles as is common on smart switches. The only downside (IMHO) to my system is they always "rest" in the middle orientation so they are "worse" than "dumb switches" in that you can't look at the switch and see the state it's in. That said, 3-way switches have already eroded this ability and I feel like this is an acceptable trade off. Maybe in the future people will care enough to make the switch represent the state correctly (with little servos flipping it) but I don't feel like I'm missing much. You may disagree.
[2] My exception to this rule is I will allow a Smart Bulb as long as there is also a Smart Switch. Maybe you can't change to color temperature via hardware on the wall but you can always still turn it on/off at the wall. Graceful degradation.
[3] My information might be out of date but I have very little interest in Thread/Matter, I don't want my smart devices to _ever_ talk to the cloud. Which is why I love Z-wave/Zigbee, they talk to my hub, my hub talks to whatever I want/approve. I never want my devices updating (or more likely, bricking) due to the cloud. I understand that Thread/Matter do not immediately mean "cloud" and in fact might even require local control but I'll believe it when I see it. So far Thread/Matter have been a massive nothing-burger IMHO. Maybe in a few years I'll be all-in on it but so far, I don't find it compelling at all.