As a user, i'm glad when devs use old tools so that my battery has a chance of lasting the whole day and my apps don't take 10 seconds just to open.
Yup, same here! The story is as old as time, and the examples are plentiful. First Slashdot, then Reddit, then now GitHub, all became far-far-far slower and less usable, once they've been "improved" by the folk engaging in the resume-driven development:
Why is GitHub UI getting slower? - https://news.ycombinator.com/item?id=44799861 - Aug 2025 (115 comments)
I am, too, as a user, quite pleased that F-Droid is keeping it cool and reliable for the actual users.