Material 3 Expressive

These don't increase usability much for me.

Since long ago and still now, I had good ideas for usability (self-judged) and would have loved to have worked on them at Google to beat iOS perhaps. But their leetcode interviews (for SWE, not design) completely barred me from stepping foot in and being able to suggest changes.

Perhaps I'm just another soul who thinks they have valuable ideas. But this makes me wonder how many people with impactful ideas they've passed up on because they didn't fit into their leetcode-shaped prototype.

Have you looked into UX Engineering? It's a discipline for people whose expertise spans engineering and interaction design (e.g. might have been in one of those roles at companies that don't have UXE). It's been a while since I've interviewed, but I found the questions to be fair and not at all "leetcodey."

It's also an important niche - people who learned to build things because they like to make, not because they found CS interesting. UXEs tend to be versatile people who can not only flex in a lot of roles, but are also good at translating the expectations of one role so someone in another role will understand.