I get your point about the complete absence of long term reliability. So here's my rant ... poor reliability seems to be the way of things now and it likely comes from companies prioritizing this quarters profit over long term company stability. It's easy to come up with quick solutions that won't last but do nice things to this quarter (or next quarters) profit while disregarding any long term customer satisfaction. By the time the thing breaks the company may or may not still be in business anymore but the management team likely will be completely different. The first team made their profit and the cleanup and poor reputation has fallen on the new folks. They continue on with the same bad decisions.
Companies don't grow and last and prosper if they don't look after their customers.
I never recommend the raspberry pi music servers to anyone who isn't a tech. Every now and again there's a minor glitch that requires a low level tech skills to fix. Easy for a tech but too much for non techs. So a solution like you are talking about, a well designed and executed finished product, would be right for the majority of people. No idea how to sell such a thing or how many people might be inclined to buy it.
But the sound quality of the off the self Pi (using the Allo boards, linear power supplies and a bit of tweaking to the sox rendering and input buffer settings) is FAR better than it has any right to be. Cheap, quick and sounds good. If you're just looking for an easy music server for your own (evil) use then it's a fine choice.