Does the new Terrain system support run-time modifications at real-time speed?

I have a 2018.1 project that makes heavy use of real-time terrain modification as a core feature of the game. Previously, to make this work I used Unity terrain ONLY for the physics colliders at a much lower resolution than the visual terrain system I built from scratch. So I basically had to update both systems in real-time. It worked fairly well.

I've left it abandoned for awhile now and have planned to come back to it. I was wondering if I could now use the new terrain package by Unity to consolidate my work into a single heightmap that updates both physics and the visual mesh.