Pure alsa: cause jack sndio pulse and pipewire are all just frontends to the real thing.
Basically, everything else is a bloated unneeded piece of shit.
Jack holds no real purpose as you can do all of it through simple aloops.
Pulse has no purpose as you can do everything with virtual volume specifications
pipewire has no purpose as it's just redhat trying to undo the mess that is pulse.
Pretty much everything is just alsa, theres no reason to use anything else.
Additionally, the default asoundrc for alsa is 10x more stable then any of the above.
With pulse and jack you'll regularly get xruns and the audio will become all mangled and shitty.
With just alsa it just werkz