I have a terrible backup strategy of dumping everything into Onedrive. I used to run a home server that I copied files to and when mechanical hard drives were a thing I was a lot more religous about backing up data. I’ve only had one SSD fail on me since they became a thing and that was an el-cheapo random Amazon brand.
I mostly use cloud services for day to day computing - I do my day job through a virtual desktop, so my workspace is the same whether I’m at home or in the office.
My email is online, I don’t do a great deal of word processing, spreadsheets or anything like that when I’m off the clock. I rely on iCloud for photo storage. If I’m doing any serious work, this is done on my Shadow cloud PC along with any gaming as most of my computers are fairly low end.
I like to be in a situation where if my PC died tomorrow, I could pick up where I left off on another machine with no real delay. I do put my trust in cloud services continuing to run which might be a bad strategy but hope for the best.
On the other hand I do take a bit more care of things such as this very site - the forum database (e.g all of the posts) has a daily overnight backup to a different datacentre, and a snapshot of the entire server - forum software and underlying operating system, is taken every 2 days so should something bad happen we won’t lose more than a day’s worth of posts.