Ethanol fuel

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It's generally not a problem if you know how to deal with the effects of it.
EFI fuel line instead of rubber hose, fuel boil and so on.

that is exactly how I used to deal with it but the last two years I've had little white blobs of greasy waxy crap in my fuel that plugs filters to beat hell and even fills up fuel lines. Carburetor cleaner won't touch it.

The attached picture shows what it is. It's like grease bubbles with fuel or something inside. This piece is the same size as the id of my mowers fuel line, and about a half inch long.