PipeWire was also made by a guy with a lot of multimedia experience (GStreamer).
ALSA was kind of OK after mixing was enabled by default and if you didn't need to switch outputs of a running application between anything but internal speakers and headphones (which worked basically in hardware). With any additional devices that you could add and remove, ALSA became a more serious limitation, depending. You could usually choose your audio devices (including microphones) at least at the beginning of a video conference / playing a movie etc, but it was janky (unreliable, list of 20 devices for one multi-channel sound card) and needed explicit support from all applications. Not sure if it ever worked with Bluetooth.
I still need to use alsamixer to unmute my headphones after accidentally unplugging them and plugging them in again fails to do so. That's with PipeWire - never had that problem with just ALSA.
Eh, I had to do that with pulseaudio too, but constantly, across all distros and headphones. Pipewire is shonky, I have to restart now and then on my steam deck (I'm using it as a desktop), but it's still much better than pulseaudio. Even ALSA was better than pulseaudio lol
For most of the (sadly not shorter) life of PulseAudio, ALSA was more reliable, but at some point, Firefox got a new audio backend that straight up dropped support for ALSA, and a few games started crashing with backtraces indicating audio trouble when not run with PulseAudio. I've had to deal with PulseAudio's dropouts under load, latencies and lockups for 2-3 years before PipeWire became a viable replacement.
I got stuck for two weeks installing the kernel because I forgot to mount /boot. Perhaps I disabled it by accident when goofing around in alsamixer? Or my card did or didn't have hardware mixing?
I didn't actually know anything about Linux at the time and started with Gentoo because I saw a meme saying "install Gentoo" and people told me not to start with that distro. So it's possible I messed up the default config by accident.
ALSA was kind of OK after mixing was enabled by default and if you didn't need to switch outputs of a running application between anything but internal speakers and headphones (which worked basically in hardware). With any additional devices that you could add and remove, ALSA became a more serious limitation, depending. You could usually choose your audio devices (including microphones) at least at the beginning of a video conference / playing a movie etc, but it was janky (unreliable, list of 20 devices for one multi-channel sound card) and needed explicit support from all applications. Not sure if it ever worked with Bluetooth.