I'm not going to say anything against that as a personal preference.
Well, indeed. I was mostly commenting on
my deal-breakers.
However...
But to say they should do that; well, I think, financial motivations aside, they know their audience and what their audience want.
While this is certainly true, it only applies to their current audience, and there's a limit to how often you can sell the same stuff to the same people. If the games are going to survive, they really need to attract new players.
I'm very much of the opinion that those 1,000 pages of core rules are a major impediment to new players coming into the game. Indeed, I was in the process of introducing the game to some new players, and the moment they saw the books
I saw their enthusiasm die. "We need to read all that to play?" they asked.
And the truth is that while
they didn't need to read it, or indeed anything, for a new group to start up it is true that
someone needs to have read the rules, and created an adventure, and the players have to have created characters, and then they get to
start having fun. $100 and several hours of reading, is just too much initial investment to ask people to put in to a game that they
might like.
It would be a different matter if we had a good Starter Set, but there hasn't been one since the old Red Box. Too often the boxes represent a "pay-for preview" or, worse, use a dumbed down ruleset. What then happens is that our potential player bypasses the starter set in favour of the 'real' version of the game... and then goes play WoW instead of doing all that reading.
So, yeah, I do think that D&D and Pathfinder should go to single Core Rulebooks for their next editions. Indeed, they should build their Starter Sets around the
same Core Rulebook everyone else uses, and then build up from there.
(However, this opinion may be revised when the Pathfinder Starter Set hits. It's possible that that might do what it needs to do, and brings in lots of new players. But I'm not holding my breath.)