Doing a little more digging, I find that Bodhi, Peppermint, and Zorin are all based on Ubuntu 18.04. As @KGIII indicated above, it looks like these will be losing support next month, and that's a problem. Peppermint is working on version 11, but it has been slow going since their primary developer died a year ago. Zorin is working on version 16. Bodhi has been pretty constant over many years too, and I'd expect to see a new version from them soon as well.
The downside to these new versions is that they will likely be based on Ubuntu 20.04... and they will no longer support 32-bit installations.
The downside to these new versions is that they will likely be based on Ubuntu 20.04... and they will no longer support 32-bit installations.