Love MASH. I’m sure I’ve seen every episode at least once. Watched it as a kid in the 70’s and later the many reruns. My father served in the army during the Korean War and it was his favorite show ever.
It definitely changed over the years from a standard sitcom (with laugh track), to a mix of drama and comedy, with more serious plots. The characters became more developed and more realistic, IMO. Really good writing overall and great ensemble cast. I watched the finale at a party in my college dorm, with everyone dressed for the theme.