I wish we would admit that you can't have it all. You can't have a product that is open source with neutral foundation governance and also have that same product be de facto proprietary. People have been pushing this bait-and-switch business model for too long.

Conversely, I feel like a company with a cracker jack support team to match their sales team could profitably sell support for ALSA if they wanted to.

It was not really proprietary though? I don't like Collabora Office at all as a product (sorry, and I have tried) and the branding situation is super messy (sorry but it's true) but all the code is online.