To add to this from personal experience; we sell proprietary software that runs on multiple platforms. Our market is broadcasters, CDNs, telcos, media companies.

We target Ubuntu and Alpine, but also ship CentOS/Rocky/RHEL/Oracle/Alma and Windows. Even though customers rarely ask for the latter targets, we need to offer those simply because we wouldn't be taken seriously if this major market segment were absent on our website.

I’m surprised (and happy) to hear that you target alpine. Is it really in use in those market segments?

Nope, but it's used as basis of Docker containers a lot