I had a similar question wrt a 2010 4GB MBA 13" as I went back to El Cap from 10.12.1 as 10.12.1 was terrible on this hardware. Well 10.12.4 beta 1 is running beautifully so far so kudos to Apple for letting the OS settle down. I think I'm getting to the point where I want to consign an ancient OS like El Cap to history.
I have a MacBook Pro 2010 with and SSD and 16 GB of RAM (have the 13" one where you can added 16GB). Sierra runs great with it. I like it better than EL Cap.
I have a MacBook Pro 2010 with and SSD and 16 GB of RAM (have the 13" one where you can added 16GB). Sierra runs great with it. I like it better than EL Cap.