....is there a newer 2.10x version besides 2.10.38? Just curious. The main GIMP site no longer has anything 2.10x that I can see.

I know; I'm old school, but until I see Mathmap, Resyntheser, PSPI (as much as it's not useful, it still can run a few of my PS filters), User Filter, and more than a few of my Script-fus all ported to 3.X, I'm still being old school. lol

Just posing the question which I'm sure I already know the answer.

Yes, and you know very well both, 3.2.4 and 2.10.38 can be installed on same Windows machine. Maybe you have it like that?
I use 2.10.38 also on PuppyLinux, runs like a dream on older machine.
PSPI on 3? Most likely will never happen, the whole .8bf filtering is a thing of the past.

Resynthesizer:
viewtopic.php?f=33&t=21535&p=304647#p304613

Maybe so, Nidhog, but I'm already using too much of my 512Gs SSD already so haven't yet installed 3.X anything. lol

2.10.38 still works for me for now. Also, you already know I'm a filter guy so have to keep using my 8bfs for as long as they still work. Sadly, for whatever reason, Impressionist no longer works on my PC, but that's likely a Windows issue; is what it is. Even though G'MIC can do most if not all things that Mathmap can do, there's still certain features within Mathmap that are easier for me to drive than G'MIC for some of the renders I often do, so keep using Mathmap (often for my Droste and C/L renders for the curious). Don't believe Mathmap will ever be ported for 3.X either and that's just plain sad. Remember this issue happening when 1.X to 2.X happened but not so long after 2.X happened, nearly every plugin was ported to 2.X. Some stop working when they upped the versions over the years since, but then they got ported once again thanks to community efforts that I'm still very grateful. Sadly, not seeing this same effort happen as robustly as it did in the past. Glad that they finally got Resynthesizer to work but it took way too much squealing for even that squeaky wheel to finally get the grease. Sticking with 2.10.38 for now, but, as time goes on, I know that I'll have no choice eventually. Maybe when I upgrade my system I'll go to 3.X. Hopefully won't have to for another decade. lol