I couldn't get genlocked PAL signal out of PC until late 90's with Targa boards which cost as much as four A1200s in their prime. I can't even remember we used anything video related on PC until at least Pentium Pro became available (and WinNT). Amiga and SGIs were used in video production for an extremely long period of time (well extremely for technology time scale). That's why I was wondering.
For similar reasons (built-in MIDI interfacing) the Atari STs had a huge uptake in music production that has lasted well beyond their lifespan as general-purpose computers, and even into recent years. Music arrangements haven't gotten more complicated over time, so for many artists, there's just no need to replace setups using 30+ year old gear.
Commodore did some serious business mistakes.