Friends was filmed I front of live audience. I saw a documentary on it once.
Amusing people are getting angry yet they don't actually know what they're getting angry about.
I saw a documentary on The Big Bang Theory and they were surprised so many people thought it was canned laughter since it is actually a live audience. I also thought it was canned before I saw that.
Aside from Big Bang Theory, none of the American comedies I've been watching recently have a laughter track. Community, Parks & Recreation, It's Always Sunny In Philadelphia, The Office, New Girl, Happy Endings, Party Down, Call Me Fitz, Arrested Development.
Usually the sitcoms with laughter tracks are the crap ones designed for a lowest-common denominator audience.
Also think how it's filmed.
The ones with canned laughter are in sets where camera angles are pretty much fixed from 2 or 3 angles at most, think Friends' set with the apartments. You never see it from a different angle.
Now look at New Girl, and you see the whole set from all angles, it is shot and re shot the same scene and edited together, like a movie. It also has lots of outdoor scenes as well.
With a canned laugther track, they could if they wanted, put the show in front of a live studio audience like Seinfeld did, I think Cheers did too.
I thought Big Bang Theory was canned laughter because, who would laugh at those 'jokes'?
It amazes me that people will sit and watch it, not laugh once but keep watching the next episode. At least Friends had some good moments and is watchable.
Red Dwarf is a great example of how good use of canned laughter can make a massive difference.