> When was the last time you saw any job seeker seriously enquire about such practices in interviews or at the application stage?

There’s some kind of reverse-survivorship bias here. I’d never apply at Meta because their management does the “hire a bunch of excess people in the good times, so when Zuck‘s next inevitable efficiency-drive happens, the team is able to layoff lots of people while still staying operational” approach.

So I’d never make it into the Meta interview to ask that question in the first instance, and neither would anyone else who thinks of Meta in that way.