I've been doing a similar thing for about six years! Tiny with very little heat. However, I am beginning to wonder how much longer that itsy-bitsy fan will last.
I still have a Touch and my trusty Transporter in use. Still have a controller from a Duet working with the Transporter. I like the physical buttons!
Fortunately the community has kept it going. It's been running great. Way back in the beginning there were a lot of hiccups.
Also have a couple Pi endpoints for Roon. No problems there.Without starting a debate Roon doesn't necessarily sound better on the same material, just more flexible, modern, they do all the work, and funner! .......until something else comes along. Not free though.