[manachar]

"Routinely run their own servers"

That's doing a lot of work.

Sure, it happens, but that vast majority of humans (including programmers) will not be in that category.

[ShamelessC]

There are more common/accessible setups than just BitTorrent. Remote desktop software, media sharing e.g. Plex media center, doorbell cameras (and many other smart home IoT devices), PS/Xbox remote play, etc.

[dochtman]

I’d argue all of those setups combined would amount to less than 1% of internet users, so I’d hardly call them mainstream.

[ShamelessC]

Mainstream != routinely, and yes, I agree.

[kybernetikos]

Most printers and routers are running webservers. Some camera sd cards run servers. My ereader runs a webserver, it works well.