I'm pretty sure others have noticed it as well.  Whether to see them is an individual choice.  If your dick turns black and falls off, then you will know you made the WRONG choice.  It's not complicated.

I've had regulars offer it once in a while with the whole "you're the only one but we've seen each other so long it's ok", I always decline and never return. Especially since I like 69, last thing I want is to be licking up another dude's jizz

Your old fave was probably always going bare with some of her clients  .. you just didn’t know it because you never asked for it.  Just my opinion based on my experiences… most providers stop offering bare after a scare ( or only offer it to select trusted clients who provide test results) … not so many spontaneously decide to dare to go bare.  But maybe I’m wrong.
And full disclosure… I’ve gone bare with several providers with no issues whatsoever… some wanted test results, some didn’t care.  And I never believed for 1 second the 1 who told me I was the only one she fucked bare 😂

I don't see it as more "common", but it probably depends where you are looking.  All of the providers I see or plan on seeing all don't offer or advertise BBFS, most even explicitly say NO BBFS.  Of course I never asked either, so who knows.