I traded out of a 2018 Silverado Crew LT into a 2020 Silverado Crew LT because the 2018 had recurring electrical issues starting at 243 miles when it got towed in the first time. The last time it got towed in was just that for me. It turned out to be the ECM but I had lost faith in the truck.
5.3, 6 speed, 3.42 rear end on the 2018. 5.3, 8 speed, 3.23 on the 2020.
The 2018 had the trans flush early on and that ended the tranny problems. The 2020 8 speed is flawless at 11,500 miles.
In the 2018 I had swapped in the center console, DL3 mirrors, and wireless charging with harnesses from HarnessDr.com. I miss the power fold mirrors with turn signals and puddle lights and the console. I hope to find a console for the 2020 and make will make that swap when I find one. Mirrors are going to be a challenge.
The 2018 had better seats, idled at 500 RPM's smooth as a sewing machine, and pulled better from idle with the lower gears.
I had some health issues that took precedence at the time I traded and inventory was as bad then as it is now so I didn't have much time or choice to make the decision to trade.
The 2018 would have been my last new truck if I had any faith in it being repaired for good. I miss the upgrades I did to it, the seat comfort, and the idle.
Hopefully the 2020 will be the last new truck I buy and maybe the electrical gremlins stay away since it has so many more gadgets. I've gotten up to 24.4 MPG in the 2020 and just about have the seat dialed in. I like the new body style especially after de-badging it. The fenders look soooo much better without those big blocky letters on them ! The HD rear camera with trailer assist is leaps and bounds better than the camera in the 2018. It doesn't blind me in the cab at night and the extra back-up lights I added don't wash it out. Homelink is nice for the garage door opener.
The crazy trade in offers have also caught my eye, even on my 2020 the offers are crazy since there is so little inventory.
If I had to make the choice between a reliable K platform and trading to a T platform knowing what I know now, It would be a damn hard choice, but I am pretty sure I would go with the K platform.