Everyone lands at a different spot. Personally, I don't want to write any new code in something that doesn't have ADTs, or the moral equivalent (Java's sealed

Everyone lands at a different spot. Personally, I don't want to write any new code in something that doesn't have ADTs, or the moral equivalent (Java's sealed classes). I've already written a lifetime of code without them, so I suppose part of that is not wanting to write another 20 years of the same code. :)