Can you explain more the part about native apps being hard to make? I mean, I can open Xcode, start a new project, hit run, and there's an app ready to go, with a simulator and everything. It has API's that allow safe access to OS-level resources. It has powerful multi-threading, built-in views that I can reuse (like collections), stack based browsing is native, etc... Also, the client is not broken by default (I.e. client apps in the browser are by default spyware, at a technical level).
All the weird tooling that exists around actually getting html + js + css to work like an app is an indication to the contrary. The constantly evolving ecosystems is an indication of reaching stability, not having yet achieved it.
I will say though that targeting different platforms is an issue, which is not the same thing as your claim. Yes, targeting all platforms is hard, but I don't think any one native app ecosystem is really any harder than web.
I do think there's a lot of survivor bias from people whose job it is to build apps with web technologies.
And to your point that "it won". I don't think anyone, even lay-people, like electron-based apps. It's just what they have to use because there is an infinite amount of web developers. However, I feel that it's a bit premature to call call something that's ubiquitous that everyone hates as "winning".
Also, the most used software as a matter of time on task would probably be excel, email clients, and web browsers. All of these are built natively. So with the exception of slack, and taking a broad view of the road that lies ahead, most of the stuff that's built on electron is sort of vapor in the grand scheme of things.
I think we can actually expect to see more and more native apps, due to power consumption requirements. I stopped using Chrome years ago due to its aggressive power/memory consumption and never actually really looked back.
Any way, sorry for the unnecessarily long response, but seriously what you're saying is very hyperbolic. We are literally just at the beginning of the absolute beginning in terms of what technology is going to look like. Things will be very different in 5 years and super different in 10-20 years.