Xposted from #suggestions, edited for clarity:
Currently, jump modes (rj/sj/conc, otherwise referred to as Explosive Jump or XJ) use the course/jump model, whereas a jump functions as a checkpoint, a place in the map you can fail to, and a split on the timer, but is not tracked like stage records, and you can't teleport to within a run using the restart command.
It was brought up that you should be able to teleport to these in a similar manner as the /s chat command, which is a very reasonable want, the issue being the exact implementation and consistency within the zone system.
Currently, the system is broken down into a tree, with the map at the top, having 1 or more tracks(main map/bonuses), having 1 or more stages, having 0 or more checkpoints.
XJ currently uses checkpoints to track each individual jump on a map, so the question becomes if teleporting to checkpoints (non timer only) is something that should be allowed in all contexts, or just within modes where it makes sense. Surf for example usually uses checkpoints for linear maps, and teleporting to a checkpoint would nearly instantly cause you to fall directly into a fail trigger and return to the start of the map outside of some very particular intentional setups. However, generally I don't think this is an issue, and preventing teleporting to checkpoints because it doesn't make sense in some gamemodes using the old model of zones is not worth doing.
Secondarily, XJ also likes to use different terminology than other modes, preferring course and jump to track and checkpoint. Personally, I don't see any reason to prevent XJ from continuing to use the word they prefer, and simply adding the option to always use the standard momentum terms (current implementation), always use the jump words, or to prefer based on gamemode context, as well as adding the aliased chat command /j to correspond with /cp and allowing both to work in all contexts. I don't feel this adds any unnessisary complexity or confusion to the system, especially if you make always use momentum terms the default.