you should considwr MPL, if someone found a security vulneravility theyd be legally obligated to tell yoy for example. also, it still allows commerical closed source software. try it!!
youre right i was thinking of xwayland, tysm. also, yes i was thinking of pipewire-pulse. i was worried these compatibility layers WERE the programs in their entirety. as in, they had no protocols themselves but rather optimised older, deprecated ones.