I still hit bugs with Arch and I know they can hit Ubuntu as well[0], for instance, If anyone can connect to an amazon echo as an audio device I'd like to know what version of bluez and/or pulseaudio they are using, as it stopped working after an update a while ago...

[EDIT] Though to be fair, I think they did call out bluetooth as one of the things Ubuntu was going to focus on in their next release IIRC.

[0] https://askubuntu.com/questions/871630/cant-send-audio-to-am...