I'm just waiting for the computer (a beast of a machine (iMacPro)) to download the Big Sur upgrade. Since Catalina broke (and i mean broke, as in certain keys on the keyboard haven't worked no matter what, since Catalina accidentally forced itself on my MBP) I have kept everything at Mojave. Also, The only old 32 bit program I use is for Poser: RSR Converter. I don't use it for RSR so much as merging in multiple runtimes. I keep my content divided into runtimes based on character generation, theme (interiors, props, outdoors, cartoon). This makes it relatively easy to shed active runtimes depending on what I'm working on. Also, I use the tabs differently. Textures are kept under the generation tree, which branches into mrphs and textures (where the UV matches). So daz gen4 has it's own runtime. Clothing is kept under props. Textures, morphs, and poses, are kept with the prop/char. Doesn't matter what extension. I find the organization is much easier to find stuff rather than having the same tree in different tabs.
Anyway... mojave is starting to go a bit unstables. granted, I'm doing some dev. But I've had two different machines simply turn off when I'm resizing a window. Up until this last week, mojave has been rock-like. Also, one on the things I use (mkvtoolnix) requires something later than mojave, now. And I'm messing around with custom handbrake compiles. And I'm compiling luxcore (for fun and punishment). SO I need Big Sur.
I worte some python to take the place of RSRConv. Actually, It started as a bash script (I still use) to convert RSR, and extract the installers from old Daz content, I have is rearrange the directory structure as I like, then merge it into appropriate runtimes. The final bit I left off on was the part that went to the content sites, pulled the metadata, kept track of what was installed and where. it also dedupes to hard links. First time I tried that, I made the big mistake of not limiting the deduping to per-runtime. you can guess what happened when I had a runtime inactive and the hardlink pointed across to another runtime. Yes. It fall down, go boom.
48 seconds remaining. Then the update starts. Wish me luck!