Reminded of DiskFreeze (or something ismilar, Freeze was for sure in the name), that i installed in my PC after seeing it as some cyber cafes. Basically, one partition with all the software was under this DiskFreeze, and another partition / disk where I stored documents and files. DiskFreeze restored the disk/partition with OS+software on every restart, meaning that I was infected or corrupted or anything, a simple restart would fix the machine.
The trick to install a software was to disable it, restart, install it, enable it again and restart again. I only did that after installing a software and test it for a few hours or days, which of course didn't mean anything, but at least I didn't see any visible problem.
The early ~2008 Linux-supplied dirt cheap Acer Aspire One A110L netbooks came with small (8GB?) and horrifically slow SSDs.
Back in the days of such things, we'd upgrade the RAM and use Windows XP with the write filter to make them great little machines. There was an SD card slot in the side that would happily store files.
The SSDs were very limited in read-write cycles from what I remember. More noticeable they brutally slow at writing. By shoving all the writes into RAM instead of direct the SSD, everything ran more smoothly.
If you wanted to keep any changes (usually due to OS or software updates) then you ran a batch file that wrote out the changes to the SSD before shutdown. Otherwise you shut the machine down and all your changes were immediately forgotten.
The trick to install a software was to disable it, restart, install it, enable it again and restart again. I only did that after installing a software and test it for a few hours or days, which of course didn't mean anything, but at least I didn't see any visible problem.