I have 50 engines. Lots of them set for over a month, and months. The most significant thing I've discovered is to "stir up" ethanol fuel that's sat awhile, makes it easier to start after sitting. For example tip a lawnmower up and let it plop back down. I like the squeeze bulb type carb primers. Draining the carb is good too if you happen to know it will sit for a period. If not , well spend a little effort to shake it up before pulling on the rope. Which might be difficult with a riding mower or 200 lb generator for stuff like that I use a can of starting fluid.
But in any case with 50 engines under my watch I've been paying attention to this ethanol paranoia for the past 4 years and have found that the problem is a tiny fraction of the hype. Agreed it would be nice if the problem didn't exist. No pollution at all would be nice too but you cant have everything.
I do prefer the way my motorcycles run on pure gas. But another good way is to buy a motorcycle with so much power you don't notice the difference.
Interesting notion about separating & removing the ethanol. Seems like an awful lotta work for dubious benefits but now curious about the resultant octane after such a process.