People inquiring about wheels are generally quite good about including the relevant information we need to make a good recommendation, but one usual inclusion leaves me a bit confused - length of ride.
Apart from when I would be sure to use alloy wheels on rides where there were going to be big hills, which were almost always "long rides," I've never differentiated wheel choice based on ride length. You could certainly make a case for going with something somewhat less deep for a long ride, as if you're fighting a wheel in cross winds, then that would get tiresome over time. And you know, a rear disc would be pretty not so fun over a long ride unless you were racing a long tri leg or something.
The parameters have got to be speed and comfort, which are to some degree at odds and to an overwhelming degree dependent on tires. Which puts us back at matching wheels to intended tires. A long ride with less than paved sections will call for wider tires, which calls for wider rims (All Roads being the most differentiated on that score). If you're doing something like the 80-ish mile Mass-Sky loop I used to love, which is all on road and has a lot of flats and a lot of up and down hills, you'd probably be on 25-28mm-ish tires and in that case anything from Boyd Altamont Lites to Cafe Racers would be superb. Unless you were using much wider tires, in which case we're maybe back to All Roads.
But the big thing there is that I can't see doing anything differently just because of the length of the ride. Comfort becomes relatively more important, but in the global picture I see bike fit being really important there, and then tire choice and tire pressure also being key. I don't see the difference between Cafe Racers and RCGs or Belgium+ wheels being determinants of comfort, at all. Of course speed is a thing, and the aerodynamics would favor a deeper wheel which might come at the cost of needing to pay a bit more effort fighting winds, but both effects are pretty small across the range of what we build. You might get a few minutes out of Cafe Racers versus something much shallower (like GOATs) on a long ride like the Mass-Sky, but the GOAT's lighter weight and lower depth might help you feel a bit fresher and gain some of that back.
So at the end, I'm really at a quandary of how to help people are better selections based on ride length. Any ides out there?