I thought about waiting (well, I actually did for about 4 months) but I like the '19 version better than the current alternatives. Since the '19 RL was better for me than a '19 Taco, that would never have been an option.That's assuming that one really wanted the RL in the first place.
If the currently released 2020 models of the other manufacturers had some great update that met my needs better I might have been tempted but they still don't offer the 99.9% ride comfort and daily utility that the RL offers. My "off road" is limited to a couple of treks down a dirt road a couple of times a year and my towing is relatively lightweight implements of lawn destruction a couple of times a summer.
So the '19 RL is good for me now (& will be good for my wife driving to work in the snow). Don't know what the 20s might possibly have that I "need" vs might decide I'd like. I did get the RTL-E so there's probably not much that will change at the higher trim levels vs stuff moving down-trim. Maybe some of the Canadian model stuff like heated rear seats but since it's mostly a one or two person vehicle for us, no biggie 🙂