Chrissy would've got a promotion in the company she worked in.Cindy would've still gone to UCLA

Yeah, I agree, that's probably what would have happened. The finale still wouldn't have been a proper send off to a great show.

hard to say. I was thinking they would end it kind of dumb with a double wedding or something.

As for Cindy, she would graduate maybe?

Cindy probably would have graduated, and Chrissy I could see her still being dimwitted, but they probably would have had her character married along with that promotion.

the reverend snow would have presided at janet's wedding:-P

I could see Reverend Snow performing Janet and Phillip's wedding.

Even with Terri in the finale, there was never really a very clear reason as to exactly how she came about making the decision to move to Hawaii. Did Terri deciding to move to Hawaii have anything to do with Janet getting married and moving out? And since Jack and Vicky wasn't officially getting married, I wondered if the Jack and Terri considered continuing living in the apartment, with Vicky replacing Janet as the third roommate.

That would have been interesting to watch. Vicky as replacement for Janet.
I wonder if the show would have continued for a couple more years.

Interesting thoughts guys! But I just don't think it would've been the same.

It wouldn't have worked. The reason they were doing TAC is because they ran out of ideas for the guy and 2 girl roommates.

I think probably to the fans. It was always Jack, Janet (not as a couple) and Chrissy, then Cindy and finally Terri.

Also, they probably wanted to move on to other projects or personal things going on in their lives.