That WTHIT support would go a long way on 1.18.2 version of the mod

To be honest no idea. But separate would be pretty great. Since it's always one or the other. Also 1.18.2 player base is super huge so we will appreciate it :)

I tried, but adding WTHIT in 1.18.2 seems to cause Jade to crash. Do you know of any mods that support both? Or a mod that supports WTHIT and doesn't crash Jade, or vice versa?

As a last resort, I could make a separate compat mods for WTHIT and Jade.

Closing this, Jade and WTHIT support is available in addon mods https://www.curseforge.com/minecraft/mc-mods/treechopjade and https://www.curseforge.com/minecraft/mc-mods/treechopwthit