I am typing this from a device which uses PulseAudio (FuriLabs FLX1 phone). I wish it used pipewire instead, but for now I don’t really have a choice. Pipewire doesn’t work yet with everything on this phone, so everyone with this phone is using PulseAudio (unless they don’t want working audio).
This whole situation was a concern for me too, but with Ladybird being spun off into its own not for profit, these kind of things are much less likely to occur again going forward. The project is a lot more focused now.