So, you are suggesting unnecessary or duplicate features should be implemented as plugins/extensions/add-ons? BRILLIANT!
The problem is that extensions usually slow things down a lot more than having the features coded into the program to start with. Example: Try loading enough extensions in Firefox to have it be able to duplicate ALL of Opera's built in features. As you can imagine, Opera, which is built with all these feature in mind runs a whole lot better than Firefox with a several dozen plugins tacked on.
Besides that, didn't someone already suggest syncing with Google Notes?
Service d'assistance aux clients par UserEcho