A client website is currently running on WordPress 4.0.1 and he asked for an update to 4.1.
The website uses the MobilePress plugin, which had problems with WordPress updates in the past, but unfortunately I can't find out much about that.
On the MobilePress's official plugin page, it says it's compatible up to WordPress 3.6.1 (though it's working on this 4.0.1 installation).
I have some questions:
How important is to do the WordPress update?
Can I revert the update case something wrong happens?
What could eventually break, regarding the MobilePress plugin? And how could it be fixed?
Updated, nothing bad happened.