Be highly resistant to replacing outdated tools when they fall out of favor in the marketplace. If you don't have ADD/ADHD, take Adderall or another upper so it makes your personality unstable.
---
In 2020 I briefly worked for a small company. I should have said no, but due to life circumstances, I was uncomfortable passing on the job.
When I joined, there were security problems all over the place. They were self-hosting a Mercurial server with http, not https. I eventually brought up the issue with the (cough) tech lead. (I should point out that the lead had been the lead since graduating college, for a decade, and generally had little to no mentorship in the process.)
First, I asked why they were self-hosting their Mercurial server. I got back a wishy-washy "that's how we're used to doing it" answer.
Next, I subtly pointed out, "You know, if you were using Bitbucket to host source code, you wouldn't have this issue."
The response was, "Oh, don't you remember, Bitbucket dropped Mercurial years ago."
My next response was, "Uhm, then do you think we should switch to git?" (For context, I used to like Mercurial better than git, but years ago moved everything to git when I started using git at a prior job and saw "the writing on the wall.")
The (cough) tech lead then went on a tirade about how we just couldn't switch to git, because he didn't want to have to handhold everyone in figuring out git, and then arguing about minutiae regarding minor differences between the two.
I tried to reason with him in pointing out how, if you build a business around a technology, and that technology loses in the marketplace, you put your business at risk. I mentioned that a business that used Betamax would have needed to switch to VHS once it became clear that Sony was discontinuing it and VHS was winning in the marketplace.
A few weeks later, the (cough) lead mentioned at standup that he was having trouble getting his medication, and acted like he was going through stimulant withdrawal. He never acted like someone with ADD or ADHD off of their meds, though. At that point I put two-and-two together and realized that his behavior was textbook "too many stimulants."
Shortly before my time with this company ended, they very nervously announced they were switching to git. I watched everyone on the team, except the leadership, breath a sigh of relief.