It comes down to the question of if it provides enough value over other competing products (which may be free or lower cost) to justify the price. If you sell 10$ widgets that solve $100 problems, you may wonder why nobody is buying your $10 widget when it "provides so much value" and it is because a $1 widget solves the same problem just as well.

Note, I am deliberately using a generic example, I use Ghostty but I haven't tried Rex yet and I have no idea how much value it provides over competing widgets)

yeah, that's true. but I would say with dev tools and such, people might easily fork over $10 if they think it's nice

I'd say the whole "lower cost" thing is less of a problem when it comes to ergonomics, we know that many devs buy all kinds of fancy split keyboards and things like that to make their workflow smoother, so I wouldn't be surprised if people easily forked over money to this

question is if it will actually take off or actually provide/slot into workflows that people actually like etc. if it's heavily opinionated or not really innovative, I don't see how people would "move over"

just my take though.

Absolutely, ergonomics is a huge part of the value- it solves a real problem.