Been distracted for a few days with more important stuff, but finally got back to listening to music.
Just wanted to report that I got the build 571 notification. I clicked update all and it did that with no drama and picked right back up where the previous version left off playing.
I am running Windows for core and client playback on a wired network. For my android control, had to go to the play store to update. No drama there either.
I gripe about a lot of roon weirdness and whatnot, but the update process is slick, and for me, bulletproof. So credit where credit is due.