It will make changes as needed. However, some plugins and themes may still not work. Ideally though, it should be a smooth transition. I updated mine about 4 days ago without incident and I use a fair amount of plugins.
Hi Tim, Joy of Joys it turns out my server backs up every night, so no worries there. Do I need to turn off my plugin’s before updating?
Being vey cheeky, do you have any knowledge of the GraphPaper Press Side Winder theme Tim?
Nope, I don’t have any experience with that particular theme. You shouldn’t have to disable your plugins. It should update automatically barring any issues with the theme.