Re: Another major difference -
No downsides? I take it you aren't using it for software development then. Most IDE's inexplicably stopped being at all stable with Sierra. Which in a development environment is tantamount to worst nightmare, some of my compilers wouldn't even initialise, luckily i had the common sense to VM it before installing it on my main machine. 6 months is my usual time delay for upgrades, hell, I only started using EC 3 days before Sierra went live. Security updates never required installation of EC, so didn't bother. If it ain't broke, don't fix it.