It appears every time the game starts to make some headway, new bugs that further ruin some players experience tend to crop up.
Not experiencing any of them. Not denying that they are happening, but it's not as prevalent as people would make it seem. The only "game breaking" issue I have had lately is that no matter where I place my ferry, a road cannot connect to it because the terrain is f***ed.
Most folks will hit the wall at some point. And the worst part of it, it seems to happen when your city grows in size, talking 300k+ population.
I have hit the Global Market not working several times (without the resource for your power plants, your population will dwindle) I have hit Rollback loop several times (cant progress) Having plenty of a resource, yet part of your city is going without. (water, electric, sewer, etc...)