I think there was a rush during the early Intel transition because they were dirt cheap computers you can upgrade yourself and even dual boot Windows. I feel like there was another big bump for them as a set top boxes to run XBMC or something. Might be wrong though. M1 release also saw the Mini's be a cheap entry point to seeing what Apple Silicon could do.

The first Intel Mac minis came out in the era of Front Row, Apple's attempt to turn every Mac into a media center computer. They had IR sensors and remotes. I had one hooked up to my TV, which was a big step up from the first gen AppleTV.

Plex started as a Mac-only XBMC fork during this era. There were also apps like Remote Buddy which let you control pretty much everything with the simple remote that came with the Mac. Apparently Remote Buddy still exists and works with the current gen Siri Remote.

Even to this day there aren't really a ton of options for a non-devkit, non-router arm64 machine that you can use as a desktop workstation.