While browsing the world of control panels, I came across Webuzo, a panel from the makers of Softaculous. I'm familiar with that soft app, because it's one of the most important elements of CPanel. Webuzo is an extremely powerful panel that has the added advantage that you have access to a multitude of installation scripts from Softaculous. Only... it's not free. But I can try it for free for a month, and that's what I'm doing right now.
I got to this point because I've been trying out quite a few panels in the last few weeks. Of course, I didn't keep re-rigging my server for that. After all, you can test something like this in a virtual environment, thanks to VMWare...
All kinds of panels are canceled for the time being, but Webuzo has made an impression. I finally installed it on our home server and it runs very nicely. It has a fairly quirky learning curve, but that doesn't diminish the confidence.
I haven't figured out how to get the email working using the Maildir format instead of Mailbox. But other than that, it's all pretty promising so far. I got an email and a web server up and running. And I've also found that upgrading to Ubuntu 19.04 for Webuzo has the same effect as putting a bucket of water on a campfire. But ok, one can live with that.