So how much do i lose just operating with the Lionchief app....Maybe that is where i start?
I am not sure if I am the best person to answer this question. I know that individual crew talks cannot be controlled. The 5 bell types and 5 whistle types that are available in the newest Lionel locos are not available. One big missing function is the ability to do multiple unit lash-ups. Though there are a few exceptions, most Legacy locos require the full Legacy or TMCC system to create a MU set
My legacy GS-4 has full movement functionality including momentum. I can turn on and off the default bell and whistle. It can do crew talk, though not user selected, but a random output Smoke can be turned on and off also. It’s enough for me at the moment and works well on a smaller layout like mine.
I would be happy to hear from and invite others who are more knowledgeable then I on this topic to respond. I am sure I am missing something. And again, I am not promoting the LionChief app over the Legacy system, I am just saying that it works out of the box and might be enough for many people.