I am still using my Insteon devices with X10 Primary Addresses for now along with Insteon.
Mostly not needed anymore as the RemoteLinc can control the lights now, except a few X10 switches where Insteon will not fit. Basically where my old home only has no Neutral wiring in the switch box. Insteon switches need a line and neutral wire. Technically a control only switch does not need a load if it is linked to another switch in a three way setup.
Also there isn’t a Insteon Chime Module so for now I have a mixed system. I also have a decent X10 repeater across the phases.