Oh yeah there are still 2 stroke oils out there not compatible with Ethanol.
The level of ethanol in the fuel is of course important. I can't share restricted reports but found some reference to incompatibility in this report conducted by Dartmouth University in the UK:
Generally the synthetics 2 stroke motor oils are compatible and the mineral oils that are compatible will cary some information around this in their technical data sheet.
At E2, there are very little incompatible.
at E5 some mineral oils will drop off suspension at low temperature and at high temp they exhibit reactions that creates residues.
at E10 then the the synthetics (PIB's ) come into their own.
E25 qnd higher the Group III, Group IV and Group V base oils are really whats required.
If you're unertain, then pull up the TDS or MDS for the oil you wan.t to use and ring up the Oilco tha markets it and ask their tech rep about compatibility. Try to speak to a STLE endorsed Certified Lubricant Specialist if you can