No mass exodus of users to the Darkside any more than there are Darkside users coming over to Trainz or using both anyway. I won't ever user the other one as it's on Steam.But to be clear about this: if something works and is error-free in the latest version of TS12 and on the DLS, it's very, very likely to work in TANE. There are sure to be specific exceptions, but that's what they will be- specific exceptions for very good reason.
Not much being made? well there seems to be an awful lot of UK stuff appearing on an almost daily basis on the DLS, don't just go by what is posted on here