^ that is true, but there is more.
When guys first started stroking these things you had the readily available Weisco 513 for banshee cylinders, so they would just do the ol spacer plate to get the cylinder up so it did not clash with the head. This was obviously the standard in engine building for decades as the aftermarket cylinder thing was only then coming to life.
Now that there were tons of 110 rod 4mm strokers out there but common issues starts appearing. Oval as fuck bores were showing up every where. So fellas started using 115 rods but as that's just way to much to move the cylinder and ports, they had to find another piston to physically allow it. Simple solution, the blaster pistons. Weisco was already producing them in droves and there were shops all over stocking them.
Eventually Weisco met the demand for a banshee specific Long rod piston with the 795. With the readily available parts, ACTUAL builders began testing combos. At that point, guys were tired of melting motors due to base leaks and also many people weren't a fan of putting the ports up higher. Sure it was ok on older stuff that would love more duration, but the banshee already was flirting with higher timings for a recreational bike. So giving away the low end by using a plate was had to swallow. That's why old bolt on strokers were such dogs. Any low end gained with the stroke is tossed by moving the ports up on a plate.
By then cool heads were common as all hell, so builders were messing with more dome ideas since they didn't have to do a new head every time. To boot, with old milled heads cutting step in them wasn't always the best idea if it had been milled. It meant coolant leaks if you were really making the juice. So fellas started just leaving the cyl where it was intended to be, and cutting step in domes.
Just trends in motor building and part availability. That's all. See Why yet RU?