Of my computers that currently run Windows, all are running Windows 10 but only two are Win11 capable or capable within reasonable upgrade costs. I imagine that I'll stick with Win10 there at least until EOL.
Also my Apple based machines have made it as far as Catalina but upgrades to any future OSx versions look less likely. As Apple changes towards in-house hardware it may become necessary to simply drop that format as well.
The first computer that I actually owned was a portable, not so much as a lap top but rather the whole lap. It was a twin floppy drive TeleVideo about the size and weight of a Singer Portable Sewing Machine.
Spreadsheets were nice but my true love was relational databases.
I find it amazing just how many of us are or were or wuddashudda been involved in computers and from somewhat close to the early days of UNIX™ and mini/micro/standalone systems.