That RPG video I linked to above, looks close to release.
It looks like partial implementation of (single-player?) WoW. Calling it an RPG at this point is a big stretch.
As they say, money talks bullshit walks. So I'll make an RPG engine + demo with it to show it can be done. I don't know how long it will take, because I'm an unmotivated slob. If I was motivated like the old days, I don't think it would take long at all. Watch my sig for news.
Of course, in order to make your point and inspire others, this RPG demo will have to implement actual RPG features, such as combat, inventory, looting, dialogue trees, quests. A guy running around and equipping/de-equipping his cloak does not count as an RPG demo.
You see, Vogel made an engine a long time ago, before all this fancy new stuff became available. He keeps building on top of it, and there's way too much effort spent and inertia to go and make one from scratch.
His recommendations come from his actual experience with his work. They may be considered out of date, but they worked for him.
Same goes for my engine, which has been seriously in the works for a long ass time, and just because Unity came out a year ago, I'm not going to dump all the work already done in favor of learning the amusing quirks of a series of plug-ins written by a committee while giving up low-level control of CPU time and memory management. I have 1400 people walking around a 3000x3000 map in realtime, and before Unity became free, I already had
this level of gameplay mechanics.
I plan to reuse and upgrade this engine a lot.
The other people who have been doing this with great success are Valve software. All their products are built off the Quake engine license, and they've been growing their engine on top of it since 1996. By now there's probably 10 lines left from the original engine code, the rest is all theirs. Left 4 Dead series, Team Fortress 2, Half-Life 2 - all from the same in-house engine.