But those are all custom builds and don’t fulfill the definition of being possible to “buy ready made” given by OP.

Batmobiles. Lots of companies sell Batmobile toys, no companies sell Batmobiles.

The BeOS file system actually had such functionality: https://arstechnica.com/information-technology/2018/07/the-beos-filesystem/

Bamse — världens starkaste björn!

Sorry, no, that’s not how it works, not at all.

I’ve recently started to like the sarcasm of Lisa Eckhart: https://www.youtube.com/watch?v=cXPKN_HfKQg

Tmux was purpose built for terminal multiplexing.

Was screen not purpose built for terminal multiplexing?

When tmux was first released I was already so used to screen that I never really considered switching. What would some convincing arguments be for me to make the effort to switch now?

I recommend reading this insightful, sometimes hilarious, sometimes frightening, but almost always educational collection of texts about open source development:

https://un.curl.dev/

What is this referring to?

https://support.google.com/pixelphone/answer/7535326

“Will that be smoking or non smoking?” Asked as a restaurant

I was asked this at a café less than ten minutes ago now.

[…], particularly when end users tend to despise particularly greedy live service business models.

Have you considered making your business models … not particularly greedy?

The great Umberto Eco once wrote some wonderful musings about the similarities between different then popular personal computer operating systems and different branches of Christianity. I see that’s now 30 years ago this year so now might be a good time for a repost, English translations and Italian original can be found here: https://www.simongrant.org/web/eco.html