...I've never understood the idea that an encyclopedia is something a serious researcher would use?
At least no more so than, say, a serious student of maths might look up a word, perhaps 'group', 'graph', 'statistics' or 'cosh' in a dictionary and expect to learn about maths from what he read.
That's not to say a book or site purporting to be one shouldn't be as factually accurate as it possibly can, but encyclopedias are Childrens' school books or for those quizzes in the pub. Solace for laymen.
At best, a good one might help with science fandom and similar.
That's to say those people who read 'Brief history...' or perhaps watch Red Dwarf / Douglas Adams or glimpse a 'Hawking says he was wrong!...' BBC headline, and then argue about the contents of those books and articles believing themselves to be 'debating' physics, using prose on forums. 'The universe is expanding, like a balloon, it said it in the BBC article FFS, I say a white balloon is most likely because light is..." "Pah, you're just saying that because you use a mac!" and so on.
They seem oblivious to the fact that the guys that write the fan books / press releases and so on deliberately talk down at a level they think members of the public will understand or to catch attention. Instead those fans believe that the book has actually taught them physics, astrophysics, cosmology, evolution and so on.
Of course, many fitting that description are on wikipedia some will argue. But equally, many fitting it are the ones writing prose about what's wrong with the first lot on wikipedia. The thing is, as Bill Bryson show, you don't need to be Stephen Hawking to write science fandom. Even if Hawking did write the entries on wikipedia it wouldn't make wikipedia a journal of physics. No more than the kid's science encyclopedia I bought for my son with 'Richard Dawkins' on the front is anything other than a Children's book.
Meanwhile, researchers will argue physics using maths in published papers that the fans wouldn't understand the title of, let alone the contents. I hope they aren't reading wikipedia, but not because the entry on Gerry Adams has the bio of a villain in a James Bond movie in it.
The only useful 'research' EB and so on are good for is, if you're suffering from Asperger's and can only repeat facts about a subject without actually having any understanding of it.