[benhurmarcel]

Not all of them. For example if you open a conversation in messages it slides left, and you have to wait before you can scroll. When you cancel a route in Maps it zooms back on your position and you have to wait before you can move the map again (and it’s really slow).

[accrual]

Another example (mentioned by another commenter) is the Magsafe animation.

Siri can be in the middle of responding to a request from my phone when I dock it to my Magsafe charger on my desk, and it obliterates the request like it never happened. Also, cannot use the phone for about 3 seconds after docking it. The green "your phone is charging!" animation takes precedence over all.