I would say the three biggest immediate benefits of High Sierra over El Capitan are A.) the new APFS filesystem (which mostly benefits systems with SSDs), B.) active and continuing development on core technologies as well as base applications like Safari and some of the ones you mentioned, and C.) Safari will now block videos from autoplaying. Not sure if the latter feature is available on the El Capitan version of Safari.Hello!
What kind of advantages has High Sierra compared to El Capitan?
While I haven't encountered any, my assumption is that there are bugs in Mail, Calendar, Address Book and other applications.Are there any bugs in Mail, Calendar and Adress Book?
I don't know.Does it run well on a 2012 MacBook Pro Retina with 16 GB of RAM?
I am a bit betwixted and between about upgrading to High Sierra from Sierra. My biggest concern is that my late 2015 iMac (5k 3.2Ghz. i5 w/16gb ram) might run slower as it seems to be the norm with software updates. can anyone confirm or deny this?
I want to do a clean install of it if I do decided to upgrade.
Heck, for me, just having Safari block autoplaying video was reason enough to upgrade from Sierra to High Sierra.