I stumbled on a site the explains cantis, setup and power rather well.
https://bike.bikegremlin.com/1739/ca...ke-adjustment/
I've been running old school cantis for 40 years, first Mafacs then early Shimanos that were a virtual copy of the Mafacs for geometry. (Those early Shimanos are on my Pete Mooney, have been for almost 30 years. Joys to own and use. Rode 70miles of grave last weekend with 5000' down and never wanted anything else.
A good picture of my setup is on the website above at 4.2 Adjustment of yoke angle in the lefthand photo. Like that brake, mine have a clamp for the straddle cable on one arm so any length straddle can be used. I also run my straddle long. Simple, good power and the performance changes little as the pads wear. The brakes have enough power that I (as a single rider) "de-tune" them with V-brake levers so when I hit them hard for that mountain corner surprise, nothing exciting happens.
There are several brakes out there with the geometry I run. Not cheap, but probably the best is the Paul "Neo Retro", a close copy of the original Mafac done far more nicely!
https://www.paulcomp.com/shop/components/neo-retro/ The Shimanos I am running seem really hard to find on-line. Mine came off an early Miyata 610 of the '80s. Maybe Shimano did a run just for Miyata?
The only real drawback I can see to wide profile cantis is heel clearance. I've never hit them with mine, so I see zero reason to change. When my ancient Shimano die, I'll go out and fork over the cash for the Neo Retros.
Ben