It's important to remember how unassailable Apple felt before that. Any kink in their armor hurts them, and that was a big one.
However, I think developers are likely to stay with Apple as they have solidly adopted their products over the last 7-8 years, and weirdly many people seem willing to forgive a large company anything, just because they happen to have purchased some of their product range.
"weirdly many people seem willing to forgive a large company anything, just because they happen to have purchased some of their product range."
Applies equally to Apple and Samsung... welcome to fanboydom.