AFAIK Kodi can use pulseaudio and probably pipewire. I use Kodi too on those computers and I just leave it to use the default PA device that I've set. I switch the default devices with pasystray.
What's usually breaking for me is paprefs. Every so often after an upgrade, the options are greyed out and I can't share or access my devices over the network.
I never tried to setup simultaneous output before because I just switch from device one to another, but I just enabled it in paprefs and it's working too.
I know. I'm in my early 40ies and have been trying all my life to convince people around me and do what I could. But with time, I learned about the fraud that is plastic recycling and how capitalism is really not interested at all into solving the issue. My city is fining people for putting recyclables in the trash, but the recycling centres are full and they themselves trash the recycling. What matters is short term profits and virtue signalling. What matters is to look green. Just buy electric cars and everything will be good, apparently. Buy green! But don't stop buying!
Then a pandemic happened and people disappointed me en masse. We could see the changes in the environment and in ways we could live, but most people were "EaGeR To GeT BaCk To ThEiR RoUtInE", even if it meant commuting 5 days a week to the office, just to "resume" the economy. What mattered was not other people, it was the economy. Even when they forced us to stay inside with curfews, people couldn't go out to run/walk in the evening, they barred unvaccinated people from stores (I'm vaccinated 4 times but it's still not okay), it was all for the economy and to save the system, not the people. And if you had a minor disagreement with this, you were a grandma killer for wanting to go cycling at night. Then we went back to our routines and nothing will ever change. People are whining because of paper straws and want the plastic back. And all this straw stupidity is not even important on the grand scheme of things. Most people don't want to change anything. Most people will not vote for change. The system does not have any incentive to change.
I never owned a car and everyone around me is telling me how great they are and how I should definitely buy one because it's useful and practical. I would have total absolution! Some people here are vociferously fighting against active and public transit, and the government is actually cutting public transit funding. People are yelling at me when I trash some plastic instead of putting it in the recycle bin, then they drive away in their car that generates literal tons of toxic fumes and greenhouse gases in the air, accusing me of not caring.
I gave up a few years ago. We will deserve most of it.
Don't worry, the rich will eat well and survive, with their private security forces willing to kill others, while the poor will starve and die. We'll have rations and curfews but it will all be for the good of the ~~people~~ economy. Just like in the pandemic, It will be an effort of the poor, to save the rich. That's what we want. You just have to become rich before it happens.