I run mostly semi-scale engines and some scale engines designed for smaller curves. I liked that you could get MTH's best electronics package in a value based product like Railking. Not to mention the number of Railing Steamers that I have upgraded with quilling whistles on my own workbench for free. Other than Lionmaster, Legacy electronics were and still are are only available in their top of the line models.
I do credit Lionel for adding TMCC in the LC2 line up, that did get me really interested in some of those models and they are good runners. However, the LionChief versions before LC2 were of little to no interest to me as those systems are missing many key operating features that I use regularly which are present in my Railking PS2 / PS3 and TMCC locomotives.