At the moment, builders cannot replicate a nice, smooth boost path. An example of what that would look like, would be something similar to the 18 end hole of the official candy map.
If splines can make connected things with curves, perhaps this could be used to make autocurved boost paths for fun things, such as predetermined silly aesthetic paths, and cool finales.
Currently you have to plop a bunch of straight boosts in a row, which mostly looks like a bunch of angles or zigzags. Quite “jaggy.”
Dunno how possible but would be nice ^^