Developer for 2 relatively small Saas apps (< 50k users). Not in remotely the same industry as each other. One privately held, one not. I don’t think it’s industry specific or particularly common, but I’ve had a couple of job offers and seen/heard of other places with comparable benefits. A lot of it is company culture and negotiation. If a company already provides 28 days and you interview well, you can likely get that increased.