No, I don't think that dating sites have run their course.

The biggest problem is that most dating sites want to make money. So, those site really do not concentrate on trying to connect two people together. A couple months ago Match Group got fined by the FTC for 14 million dollars for cheating their users.

To make a dating site successful, you would need to:

1. Have a questionnaire to determine their personality type and match them to the right personality. There are 18 personality types. It is a challenge to create a questionnaire that would correctly select the correct personality. Without "chemistry" there will not be a relationship. This is the downfall of most sites. eharmony is the closest to do this. But, their site is very expensive and they do not have enough users.

2. Sites need to get rid of bots, scammers, etc without blocking real people. It is possible, but it takes work. two factor authentication is a very good start.

3. People need to spend more time building a good profile. Sites need to help people with that process. Whenever I see an empty or almost empty profile I reject them. Not going to waste time on someone who is not serious.

I think it's 50/50 really.. I'd prefer real world connections but it's hard to achieve when you live in the boonies, so.. jumped back in the pond to see if there's any bites (fishing reference )
so far I've had 111 like me in 3 days.. mostly scammers I'd wager smelling new blood