Faolyn
(she/her)
Wow, you want to give more than just one-word answer here? Something to support your claim?Correct.
There is no such thing.
Incorrect.
And yes, half-editions are a thing. It's why it was called 3.5 and not 4e. You can call it a revised edition if you prefer, but that's just nitpicking on the name.
And no, it doesn't matter what Call of Cthulhu does or how much or how little they alter their products when they put out a new edition because Chaosium isn't TSR or WotC.