Famously? Really? As in "some random non professional designers/adobe users complained on the intertubes".
Care to mention how, say, Photoshop, Premmiere or Lightroom CS6 are worse than previous versions? All have been praised as substantial updates.
Bonus points for not using non-technical catch-all words like "bloated".
I would aldo like to hear about the worthy replacement, with feature parity to those products.
Abode products, due to the custom UI, have some odd look&feel issues in some controls. They also have bugs like any program has (far less than most, though, especially considering scope and complexity).
That said, they are the industry leading products, with no substitution that has the same breadth for professional wokflows. So, no, its not about "tolerance", its about being the "best game in town".
People jumped ship from Quark to inDesign in a heartbeat, when the option emerged.
And when they are basically the same, the one that fits in with the entire suite of applications she uses is one she will want to use more often.
Adobe does not begin with PDF's and end with Flash.