In my previous article I outlined that I really needed to get Drupal 10 sites running in Aegir 3. I had no time to wait around for other solutions, and I was going to try to decouple Aegir from running Drupal sites, so that it wouldn’t be tied to Drupal versions. Since writing that article and actually sitting down to do this work, I realised that it’s quite an undertaking, and the approach outlined by Omega8cc in various github issues was worth a second look. It works!