I have considered upgrading to a mini pc or something else cheap off ebay and use the pi for a nostr relay or something of the sort. It'll run Knots (which I'm sure helps over bitcoin-core with sane mempool policy) and Electrs fine enough, with BTC-RPC-Explorer. All I really need it to do for a start. Realizing I can use Phoenix for my zaps makes me not care so much about running a full lightning node at this point. If anything I was thinking of taking a crack at Ashigaru Dojo, which seems like it'll be intensive.
Discussion
I run a mainnet Dojo and have for years on Fedora. It hasn't been too bad. The biggest problem has been Fedora updates changing Docker behavior.
You can use my Dojo if it doesn't work out but then you are trusting your xpub to me which isn't the preferred setup.
I just setup a testnet Dojo and was thinking about putting the QR up on Nostr so that people that wanted to play around with Ashigaru could try it out with minimal effort.