It was something that will never be replicated, for sure.
You can't experience it by streaming the way it happened in real time.
3 moments for me, and I can remember exactly where I was for all of them:
-The pilot was the greatest thing ever produced for TV. I was an Alias super fan, so I was all in on this thing. The amount of money that was spent, that Bob Iger fired the guy for doing it it's all just amazing.
-That summer between S1 and S2, you had to be there for that break, and then opening with Desmond in the hatch with that song. Iconic TV experience that can't be replicated with a binge.
-"We have to go back" was absolutely nuts. 17 years ago, and I can still remember who all had come over to my place, jumping up and yelling at the TV when I figured it out about a minute before they told us. "We have to go back" will live in infamy as one of the greatest moments in TV history.
Even outside the watching experience, the casting was just nuts. Elizabeth Mitchell (Juliet), Michael Emerson (Ben Linus), all the etcs just being tacked on as it went along.