Older car hoses can degrade faster from it. You also get less power per liter with the blend but overall no.
It also doesn’t “keep” as well (which is why you should burn non-oxy premium in small engines if you can’t get normal non oxy; or fully drain/run dry your lawn mower at the end of the season).
Learned this the hard way with my zeroturn mower this spring. Left a bit in the tank. Gummed everything up. Had to take an air compressor to all fuel lines and clean the carburator.
Reasonably priced well built electric tractors and zero turns can't come soon enough.
Replaced all my 2 stroke engines with electric last year. It's been awesome.
It's an octane booster, which helps reduce knock.
Anything past E90 is terrible for motorcycles of all sizes and many small engines.
Reading my Suzuki Owner’s Manual it says no more than 10% ethanol, but also under no circumstances more than 5% methanol (wood alcohol). It’s getting so you need a gasoline “nutrition” label to keep your 2-wheel fun machine running well.