This is sales. Lines die not because they are bad but because they don't meet the sales expectations given to them. You can be cancelled while in the black., yes. That's part and parcel of any business venture. If I can make more money in the bank than selling books, why am I selling books? And, frankly, no matter how you slice it, 4e was not successful. It just wasn't. At best it managed to capture about half(ish) (and possibly less) of the existing player base and never attracted new players in any significant numbers.
So, it lasted about 5 years and died. About par for the course for any previous WotC edition
My job would be a lot less stressful if quality and not sale expectations were what mattered.
Number crunchers and executives don't push always ideas. They can give ya numbers to reach if they want.But, again, I doubt the "number crunchers" are going to be pushing for any significant changes. Not so long as there is any growth or even if it just remains stable. A stable, evergreen product is