I switch to macOS after successive updates of Ubuntu caused audio to be a pain in the neck (due to PulseAudio), no longer waking from sleep, and wifi not workin

I switch to macOS after successive updates of Ubuntu caused audio to be a pain in the neck (due to PulseAudio), no longer waking from sleep, and wifi not working. This was quite a while ago. Audio still doesn't work by default on my Ubuntu 18 system.