I think the problem here is making the general statement "That was 12 years ago, when everything was modulated as DVB-S. Now, (almost) everything is DVB-S2 or higher. This requires a larger dish."I'm not referring to Directv and Dish, which use high powered transponders. I'm referring to common FTA signals. Most now use 8PSK. I have extensive experience (attempting) to receive common S2 signals on small dishes, and I can tell you for a fact you can't tune a common FTA S2 8PSK signal on a DBS dish at this time. At least not within the past 3 years.
That by itself has nothing to do with bit rates increasing by 2 or 3X and even with the performance advantages of DVB-S2 over older DVB, you can't close the link with the same size dish no matter what the FEC or modulation type due mainly to the higher bit rates. Nothing to due with DVB vs DVB-S2.