Roon crapped out on me a couple of days ago apparently with it logging me into Tidal. I had to log into Tidal manually then go back to Roon. I then found that a Roon update was available to resolve some Tidal issue although my Roon core updater had got stuck several versions back so wasn't taking updates so needed a helping hand. All resolved now after rebooting core.

But this highlights 2 things - Tidal has been tinkering with its login process and Roon can respond to third party changes in a timely manner, even if my core updater couldn't. Tidal ceasing to work on Sooloos is just a matter of time. Thankfully its ability to play users libraries still hasn't changed. The writing had been on the wall for Sooloos since 2014, so it's done well to have lasted much longer than that.