I would start here: https://ryf.fsf.org/products?category=1&vendor=All&sort_by=created&sort_order=DESC or if that is too limiting, here: https://kde.org/hardware/

Nowhere close to the >95% market share IE had in the early 2000s.

why, great news!

So I suspect they are also dropping their plans to require age verification on social media?

After all, public code repositories which are essential for developing the software they’re switching to are… also a form of social media, correct? Surely they do not want to sabotage its development by requiring those repos to implement costly age verification? Right?