The author didn't say the developers wouldn't care, but that the extra effort means the developers wouldn't care enough. Fixing a bug requires figuring out wha

The author didn't say the developers wouldn't care, but that the extra effort means the developers wouldn't care enough. Fixing a bug requires figuring out what's broken, and that's a lot easier when you know something broke between 4.7 and 4.8, than in any of the revisions between 4.4 and 5.6. (Especially if there were actually two latent bugs in 4.4, one of which got exposed in 4.8, and one of which got exposed in 5.2)