Completely wrong. People are asking for a spiritual successor to Planescape, not necessarily a sequel. That would be nice, but everyone knows it's unlikely to happen.
To put it another way, what you're arguing for is yet another game that's been lobotomised to fit consoles and handhelds. The thing is, there's plenty of people cranking out those games. Hardly anyone is producing good party-based RPGs, and there's a real demand for those even without AAA production values.
I didn't finish Torment until 2007. The first time through, I thought I'd hit a bug that made my game unfinishable, and gave up. When I picked it up again years later, I liked it just as much as the first time through... And it wasn't a bug, I'd just misread something.
Anyway, whatever. You have your console and handheld games. Those are everywhere. Some people would like a good, solid, party-based RPGs. If you don't, you don't.
You might want to reconsider what allusions you cast about if you ever plan to leave your parents' basement.
Perhaps. But there are a lot of them, and they make good money, and they're prepared to spend it. So why not produce the game they want?
Order of the Stick, a stick-figure comic about Dungeons and Dragons - can't get much nerdier than that - raised $1.25 million. Now, they handled it brilliantly, but it's just a comic. A new game along the lines of Baldur's Gate or Torment... There's a lot of people who want that.
A few thousand dollars in a month? Are you kidding? There are individual people out there who will put up a few thousand dollars by themselves. I'd certainly put up a few hundred if there was a nice reward level available.
Some games cannot be played on every platform. That's fine. That's a good thing.
As for accessibility, that's a worthwhile consideration, but relatively easily handled. Text that isn't fully voiced can be made available through a screen-reader program.
No. No. Completely wrong. That's precisely the type of game that gets published by the big existing publishers. What Obsidian need to do make this work is find a niche that isn't getting served well by the current system, and it so happens that their expertise overlaps such a niche perfectly.
As noted, other devices can take a running jump. An old-school RPG can be made accessible to handicapped people to a large degree without abandoning the concept - which is NOT true for the average console release.
Except, your protestations aside, that is what everyone is asking for.