I've never worked (recently) at a shop that didn't do some level of automated testing. In terms of having a bunch of people working on a big codebase without stuff being randomly broken most of the time, I'd say it's an absolute requirement to do it to at least some passable level.
In my experience it's, if anything, sometimes the opposite way -- like they insist on having testing even when the value of it the way it's being implemented is a little debatable. But yes I think it's important enough in terms of keeping things productive and detecting when something is totally-broken that you need to.
(Especially now when you can literally just paste a module into GPT and ask it to generate some sorta-stupid-but-maybe-good-enough test cases for it and with minimal tweaking you can get the whole thing in in like 10 minutes.)