Depends on what you mean "better".
For my husband 0-18 years wasn't that great.
19-50 were pretty good.
51-present have been really, really tough.
The tough part being Aspie burn out. It's harder for him to bounce back from social events. It's hard to fake good coversational skills. When he was younger, he didn't have a wife, kid and worrying about the future breathing down his neck. A future at 20 (while seems to go on forever) is very different than plannng a future at 56.
Because he has issues keeping up with a fast paced conversation, one doctor was fishing around for early dementia symptoms. That was also how is mother got her ASD diagnosis at 71. With her rigid behaviors, melt downs, social skills slipping, fine motor skills slipping, she was worked up for Parkinson Disease and Alzheimers.
What sucks is most doctors who work with an older population now, don't look for ASD people. I guess they figure you out grow it at 20. This will be different for people 0-30 now. Doors who work with younger people probably have an ASD patient. My husband has a very hard time at the doctor's office. I don't think they believe his diagnosis.
I guess it doesn't get better, it just gets different.