I never watched this show as it was current. I just remember it taking place in the background of my life, hearing the theme song in passing.
I finally watched it in 2018, and so much of it hits the nostalgia of the early 00s. It reminds me of going to my mom's office after school with her, and my old windows xp computer, and New York in the fall (similar scenery to Scranton).
Some of the most brilliant humor and some of the most heartfelt moments in television history, with an incredible cast who you know as well as your own co-workers by the end of the show. I can't recommend this show enough.