I would imagine it is at least a segment. While real-time audio is possible in Linux and other BSD aside from MacOS, the frustration comes when wanting to work with proprietary software. Since around Windows 10 many people have been satisfied with the latency of a beefy enough system, but an i5/8gb 2015 era Mac will still run real-time, inter-application as well as aggregate audio devices flawlessly. If you ever tried to work with audio in Windows leading up to this point... yeah. Anyway Bitwig is awesome and runs in Ubuntu with cheap PC hardware! Now if we could just get Native Instruments involved. Most class-compliant USB interfaces work in Ubuntu in my experience.