> I was asking parent for his implementation

This is not a valid argument, invalidating discussion of merit of thing based on not having personally created incarnation of said thing would remove 99% of debate of FOSS to no ones benefit.

Jack is actually really useful for music production, far superior to pulse audio, so yeah, people do use those programs.

My only problem with Jack is that Firefox (and Chrome too, afaik) absolutely insists on using Pulse, so you have to make both play nice if you want to use Youtube while working on music (which is actually pretty common). This can be a bit of a pain (funny things happen after suspend/resume). Still it's so useful for music/sound production, I put up with it :-)

Yeah I can relate to that, I start jack with qjackctl and run this post startup script "a2jmidid -e & pacmd set-default-sink jack_out "

Fair point, I didn't know that.

Being popular doesn't make you right.