I have a Mac Mini G4 running OS X and OS 9. I have it running HyperCard, AppleWorks 5 and 6 with a FireFox Browser. Don't use it much anymore, but I have it. I also have a G4 Powerbook with the same system running on it.
I doubt I will have need of any further upgrades as I am much older than my computers and have little interest in advancing my skills. We do of course have a couple iPad Pros.
I have a G4 laptop I’m using that I bought off of craigslist!