I am involved with an informal group of O Gaugers that meet sporadically, visit each other's layouts, and discuss topics of interest.
Probably over half of the group are fully committed to the DCS (MTH) system, and MTH equipment. A couple more, myself included, are set up in either Legacy or TMCC running "modern model" locomotives with one or both of the Lionel Trainmaster systems. And many of the rest have postwar equipment, and have no real interest in updating to command control.
What is a reasonable transition plan for the MTH/DCC guys to add Legacy, using as much of what they already own as possible?? They (most, I think) want to continue running the DCC engines they have, but recognize that (maybe) DCC is over in terms of buying anything new. That might be true, or not.
Those who have MTH transformers, what can be added to run Legacy? ZW-L is integrated into the Trainmaster systems, and using an MTH transformer you would not get that integration. I like my ZW-L, and have (just) figured out how to use it, controlled by my CAB-1. And would they gain if they went ahead now, and sold off the MTH transformer to buy a ZW-L? Or is the ZW-L "just a transformer", and the MTH version would serve just as well once a Legacy or TMCC system is added??