Depends on what yur usage plan is.
I have a few old saws just for collecting sake, and drain them every time I run them. Its just not worth it, even though I have available (and use) E0 gas. OTOH, if I used equipment every week, I wouldn't be afraid to leave gas in it, even E10.
I notice a lot of people are keeping track of how old their gas is. Little station I was at a couple weeks ago offered free hang tags to tie on gas cans to help keep track of it.
Says that its a widely-known problem. I saw a pamphlet from an ethanol plant admitting that storing E10 WAS a problem, and I was slightly offended, as it was written from kind of a loony lib point of view; their suggestion was to buy only what you'd need for the weekend. Probably meant for boaters or off-roaders: who'd buy a pint of gas for the weedeater?
My wife's folks have more-or-less abandoned the lake cabin now; its still in the family, and everybody still uses it. As we're closest, we get to go check on it, and do maintenance. Rather than haul a mower, weed whip, etc. back and forth, we keep stuff there. Its 40:fuel time for the Jonsered 2040 and little Husqvarna weedeater. I know its good, won't go bad over the summer, and it really doesn't cost THAT much to have a couple of quarts at the ready. When WE go there, messing with old fuel isn't very high on the priority list. And the other relatives seem to be happy with that plan, too.
I predict the day will soon come that most makers will require a packaged fuel or warranty will be void. I don't see any reason that dozens of packagers cant get on the bandwagon, drive prices down within reason, and make it available everywhere. It can't be any harder to blend than any other petro product.