Living in tire he77 (desert SW) there’s no WAY I’d ever settle for a 15” trailer tire again, but our environment and towing needs are different than what the OP is after. Race car, golf cart, summertime 150 degree + road temps and tire temps that’ll run in the 160s. 16” G rated tire at 100psi has been a game changer over us throwing away good appearing tires every two years not to mention the side of the road “fun” changing a tire and repairing the trailer

Funny thing on the modern 1500 is some have an equal job rating as my old 01 2500 diesel……
A nice 3500 srw crew 8ft bed 17 came in on trade two years ago at work so even though I’d convinced myself that a 6.4 Hemi 2500 would probably suit our needs nicely, we replaced the 01 with another oil burner. I will say it’s an absolute joy to tow with.