I use Umbrel and was considering Start9 for a new node but my main concern would not be solved with Start9, that apps updates are always delayed, like BTCPay and Lnbits are often weeks if not months late on both OS.

For now I went the all manual CLI way but I see its limitation as well, each new app install takes hours (first time), you must triple check everthing, understand everything, you face multiple issues to solve by yourself or github/community support and anything could break of you update the slightliest component in your system. I like to learn but I don't always have the time to do it, and maintenant it right.