I think Seinfeld feels super dated. Same for Friends to a lesser degree (but it's newer by several years). But I never liked either of those shows when they were new.
I did watch "Full House" on first-run. Its relevance fell apart like a house of cards.
Golden Girls does hold up well for me.
Many sitcoms obviously are super dated, but like movies and music (and even video games), they are products of their times and among them, the funniest along with those that have the best character interaction as well as plot development hold up the best. The Cosby Show (despite the off-screen troubles), Family Ties, Cheers, Frasier, Murphy Brown, Roseanne, Home Improvement, The Nanny, The Fresh Prince of Bel-Air, and of course Friends/Seinfeld/The Golden Girls remain classics of their era. Many of the TGIF shows (not just Full House, but ones like Perfect Strangers, Step By Step, Boy Meets World, Family Matters, Hangin' with Mr. Cooper, and Sabrina The Teenaged Witch) remain comfort food nostalgia for 1990s kids. If you look past the three-camera setup, laugh tracks, and backdrops, you'll see that most of the most acclaimed shows that were nominated and/or winners of Emmys will hold up the best. Short-lived shows like Walter & Emily, Double Trouble, Just The Ten Of Us, or The Martin Short Show of course will be left to obscurity, along with all those NBC NYC-set dom-coms of the mid-late '90s as well as those cheesy, episodic '80s shows like Benson, Webster, Gimme a Break, Silver Spoons, and The Facts of Life. They just were left in the shadows by the single-camera, laughless boom of the '00s with shows like Scrubs and The Office along with all those HBO/Showtime shows. But I enjoy collecting sitcoms from this era, including the Baltimore-set show Roc which I hardly even know about despite being from Maryland. I'll be posting an episode on YouTube soon that features Tone Loc, Heavy D, and En Vogue as guests (gotta love the kitsch factor now that so super dated, its cool again!)