"It’s a pity, because if this Trailhawk could be reliable, it might get me out of my 4Runner."
I've had both, (4Runner SR5 > Wrangler Willy's > Cherokee TH/E) here's my view:
4Runner SR5 - Exceptional reliability great off road (probably better than the trailhawk). Quiet, Comfy 5 speed auto, old tech. Although it never needed service, Toyota dealer was pretty good to deal with.
Wrangler - Exceptional off road, not to quiet or comfortable. Start / Stop issues (batteries and IBS). Loved the Turbo.
Cherokee - Have not had it off road, pretty quiet (occasional rattles), VERY comfortable. Start / Stop issues (batteries). V6 is responsive.
Jeep dealers (applies to both). Best I can say is not horrible.
If Toyota could produce a 4Runner with blind spot monitoring that got 25+ mpg on the highway, 8 speed tranny, and a modern dash, they would cut into Jeep's sales greatly.
Jeep would have to improve its quality AND CHANGE THE CULTURE OF THE DEALERS! Ex: I've been trying to get rid of a backseat rattle which may be covered by a TSB. Local Jeep dealer won't even look at it without a 180.00$ diagnostic fee, which they will return IF IT IS COVERED BY A TSB. While the Cherokee and Grand Cherokee have been good, and they have a lot of character the next vehicle will probably not be a Jeep.