Personally I don't think RTR is an option for most of the models mentioned
As can be seen from the new 201's, there are still a lot of them out there
RTR is all about making money for the producer, because of the numbers involved to actually produce a new model no one is going to enter the market
unless they are relatively certain of recouping their initial investment and then making a profit that will make the whole gamble worth taking.
At the moment it does not appear that that gamble is worth taking, money is short and there are a lot of things needed before it can be spent on model railways.
In an ideal world the 121's would now be in pre production mode with PM probably having his first couple of PP models to check out etc but as we all know that has not happened and its all down to money, he cannot move forward until enough 201's/ 071's and Mk 2 coaches have been sold to allow him invest in the 121's.
So what I think is the way forward is for small manufacturers like SSM, DK Models John Mayne Silver Fox, DC Kits Glenderg etc to get together, discuss what the market is looking for and then put their collective heads together and see who can do what and then through pre ordering here on the site, see if the model is viable and then give it a lash.
As I said this is my take on the RTR debate, any thoughts?