So what's worst case if I keep boosting and FSD goes POP! will a reboot get things moving?
Worst case, you wind up at Raxxla.
I made a 27 jump trip on a 1% FSD with no canopy after a too-close encounter with a white dwarf, back when you could jump into a white dwarf system inside the exclusion zone, in a Beluga. Worst thing that happened was having to try six times in a row to actually jump, as the FSD would spin up and fart.
[video=youtube;X-rkFaIPyL4]https://www.youtube.com/watch?v=X-rkFaIPyL4&app=desktop[/video]