I wouldn’t say the OS is Linux any more than the OS of an Apple computer is XNU. Linux is just the kernel. Similarly the other OS isn’t “Windows NT kernel,” but Windows 10 or Windows 11.

I’m not sure when you were using it, but Navidrome definitely let’s you play individual songs and shuffle.

Also only differences are stored, so if your files don’t change much each backup costs very little. I keep hundreds of backups for the previous year of changes, and it uses less than double the amount of storage the files take up. You can also enable compression, which I do, so it’s even smaller.

I use backblaze storage with Kopia, which supports using object lock. Every time a backup is made the objects for it are locked for a configurable amount of time. I use 30 days, so an attacker would have to compromise my backup software for a month before being able to erase my backups.

Yeah this is why I don’t use cloudflare, I have my domains on porkbun.

Making a docker container can make it really painless, for example I’ve found Vaultwarden (self hosted Bitwarden server implementation, https://github.com/dani-garcia/vaultwarden) to be really easy to install. Just docker pull, and what Linux distribution and other particulars about your system don’t matter.