Yes: https://github.com/beacondb/beacondb-unifiednlp

You dont need a second computer, just replace the drive with an empty one.

It does (they of course use their Azure Blob storage under the hood). Forgejo however does not (even though it supports it for releases and packages and Golang has this in their standard library).

I’ll keep the idea in mind.

Technically unlimited, but you obviously need to have enough storage to cache the zip files (and RAM to cache the file index). My server is very small, so I needed to set the limit low.

Spotify does not have the power to lock your credit card or paypal account. Account bans might happen and I have seen E-Mail screenshots of people who got banned. I am not sure if they would take down an entire set of family accounts.

If you care about the content of your Spotify account (playlists, listening history) you should not use it for piracy. Just create a new one. If you are fine with 160kbps OGG files, you dont even need a paid account.

Do not create Spotify accounts with trash mail addresses, they may work at first and get banned the next day (happened to me after I created some accounts for scraping their API).

You can also export all your Spotify data as a precaution (GDPR export from the account page, they send you an email with a link to a zip file after a couple of days).