I have the factory 3.0 live valves and like them a lot - they don't overheat anywhere near as much as the stock live valves, and the 3 click adjustments do make a pretty big difference in how the truck works within a setting (e.g. Baja feels quite different in soft vs. medium modes on the shocks and coilovers, given there is a quick adjustment to both compression and rebound on the 2019+ 3.0s).
That said, you can get even more fine tuned with the 2017-2018 factory 3.0 set up from fox, as there are a lot more manual adjustments. The only disadvantage is that if you want to get different feel on road and offroad, you are going to have to make more adjustments (in and out of the truck a lot more, and keeping track of all the clicks).
I understand many offroaders and offroad shops recommend taking out the live valve functionality because of risk of damage to the wires and sensors (eg. Camber, EXO). This is a legitimate concern on the factory set up (especially the coilovers, where the wire wraps around the coilover), but on the factory 3.0s the wires can be tucked out of harms way and the sensors are on the front of the a-arms, and I think it would be pretty hard to damage those.
In summary, if you are really into having specific shock settings, the 2017-2018 are the way to go. However, the convenience of the live valve functionality, coupled with the quick adjustment on the factory 3.0s from 2019+ is also a big plus. If you want the former, keep what you got. If the latter, then sell what you have at a profit and buy the new 2019s.
Happy to share further thoughts if you like, and good luck