hit the kernel sooner or later?
TBH, I hope it is much much later. Schedulers are nasty things to code. All sorts of edge cases and race conditions keep popping up especially in General Purpose workloads. These are a million miles away from an Android phone especially on HPC installations. The last thing you want is a CPU hog that you can't kill.
As long as there is a way of disabling their scheduler (should it ever be included in the mainstream kernel) I won't mind. I'd treat it much like systemd. Avoid if at all possible.