If it was just for backup backblaze is probably less expensive but my LAN consists mostly of pi’s and hand me down computers. I am slowly moving things around on my LAN so to each their own I guess. I like the idea of having more control over my stuff so having a whole Debian system on the other end feels right for me.
*edit: It also gives me peace of mind knowing that I can encrypt my stuff to my liking. Silly me I forgot to actually look at the encryption tool I used, I just did a search and found age was highly suggested. It is coded in Go, sure it is open source and all that I am just not a fan of the language.