How stable are the post-release 2.78 builds?

I think it was 2.49 that was super-stable release since it was the last of the 2.4x series before the revamped 2.50.
Can we assume the same thing about 2.78 and assume that new builds are on average less buggy? (assuming of course that one fix doesn’t create another problem but that’s always a possibililty).

There may or may not be a 2.78b or even a 2.79 yet before 2.7x officially ends (decision on a 2.79 will come early next year).