TBH,for me that's my favourite all time sitcom - nearly all the topics it hits are still relevant today, implying the battles it depicted were entirely plausible/accurate and how little things change despite the years The writing and acting were just perfect.
Someone mentioned Felicity Kendall, and it has to be said "The Good Life" was also brilliantly entertaining. I can't comment on more modern sitcoms though, somehow I just don't seem to sit down at the right time to watch them.