I've reset all of mine without any mysb dependency (I bought new hardware on ebay when the old ones died), and most of the radio streaming works without mysb too. Some stations don't, can't tell why.
Tidal requires mysb, AFAICT because LMS proxies via mysb and an API key is stored at mysb.
I belong to the group of people who wouldn't run a home server to listen to 1 internet radio station (BBC World Service) in the morning hours. I'll probably throw out the poor radio and end up listening to internet radio on my laptop with a crappier sound and more fuzz to start it up. But I hope there's a way I can continue to run the radio without mysb, which is currently not entirely clear.
I'm also worried for elderly and blind people who are now thrown under the bus. It's probably not the first time they experience being slapped by the cold backhand of disruptive "progress".