How many did it sell ? I assumed it was a success.

I have the same opinion, being this close to a new gen it seems logical to start with a clean slate much better PR to be seen as a feature of a new product rather than a  feature carried over from the back end of the previous gen  if there's to be any action PS5 is the place to look at.

They do have one excuse, they will require trophy support, which will require diving into the code. Unless it's run externally from the .exe on certain triggers.

I think they should. But, something tells me that they are waiting for the PS5, and will have it B/C with PS1-PS4. At launch, though, when B/C actually means something.

@bralod

Let's be honest the only thing Sony need to sell their console is a reasonably powerful machine for 400$ along with big 3rd party support and awesome exclusives. Everything else are just bonus features. I believe the ps5 will get ps1 and ps2 games along with full ps4 bc.

That's the point, the classic consoles have been printing so much money that Sony will not do what OP wants because they have financial incentives against that. 

I hope they do

Well sony isn't great at it, the ps2 classics were welcome but only a very few were released and support was cut down fast. While their are so many ps2 releases maybe would have a small audience but then you have games like PES3/PES4 would be an excellent choice.

Oh well now we have 'the mini/classic console war'

looking at prs ms have been much more arrogant than sony, but sure let's call not making a decision you want be arrogance

So if releasing a feature on their new gen won't make any difference in sales why would they take the money to make it in current gen? Just to please you and a handful of gamers? Since PS3 we already know that the BC was lightly used.