PA can provide both things, by suspending out if your need shift from consumer audio (PA) to Pro audio using jackd. No need to dedicate your box to either; they can both work for whenever people need different solutions.
Are you really saying that a feature of pulseaudio is the ability to disable pulseaudio and use something else?
Yes I do. It is great that you can use exactly the program you need, even if their usage normally are orthogonal. Please note that PA doesn't disable itself, it just automatically suspend until needed again. PA and jackd where made for different reasons and solves different problems.
I see a lot of posts complaining about anti-systemd zealotry here, but clearly there is a lot of zealotry all around. I can't recall any other topic in Linux history that has been this divisive, and that is part of the problem.
Well, some people thought they could stop the systemd progress by waging a negative campaign against it and its developers. That of course was a predictable failure.
Personally I don't care whatever init system people run. Even if I find e.g. SysVinit inferior to systemd I have no problem with people using it, and they owe me no explanation for doing so.
Systemd-opponents don't agree upon what they do like, they can only agree on what they don't like. This make their tactics so rabid and aggressive when attacking systemd, its developers, the distros that uses it and even its users. They simply don't have a positive alternative they can agree upon, so they are left with negative attacks.