I think making the MP3 converter available for purchase in Prime might be a useful way to bring people into the Studio One ecosystem. The added utility might even justify a slightly higher price the Artist one.
I've been working with a lot of newer songwriters, topliners, and lyricists and have been a big ambassador for Studio One Prime because it is miles better and more intuitive for vocal comping and punching in (a huge portion of your work when you're in these professions) than the competitors.
The only issue is some of them don't like having to use an external program like Audacity to convert every beat or track they get sent to write to. A lot of these people are writers first, vocalists second, and musicians third, so the only thing they're really missing is MP3 support- Artist at $100 is a hard sell since the instruments and such are not really useful for them. But a $20-$40 upgrade could be an easy way to keep them using such a wonderful program rather than just going with what's easiest like Audacity or Garageband.