The age gap is still gross. 30 year olds don't have much in common with 20 year olds. If I meet people that date people that much younger than them I don't associate with them any longer. They obviously have issues they need to work out with a therapist.

If both parties are over the age of 30 it is less problematic to me but I also don't think a 50 year old has any business dating a 30 year old.