#RPGaDay 2017 Day 9 - Good RPG For Around Ten Sessions
Ten sessions isn't a bad length for some campaigns. But from my recent experience Fate Accelerated works really well for something around ten sessions. The characters are pretty competent to start with - if you wanted to you could pretty much ignore advancement. If you do go for advancement your characters will advance pretty quickly, a nice way to model Luke Skywalker going from a farm boy to a Jedi Knight in a few sessions.
I think Fate Accelerated would work fine for something a bit longer, though you'd want to slow down the default advancement. Dresden Files Accelerated gives some options on how this might be done.