Not the past 25 years, but no older than a whole load of other things suggested above ... Quick Links.
In the 70s when I started playing with bikes the only way I knew how to break and re-join a chain was using a nail punch to drive a rivet out and then to use a hammer to peen the rivet over when re-joining. I think I may have bought a chain tool around then too. Anyway it took skill and mechanical sympathy, neither of which I have. There may have been a better way but my mentor Richard Ballantyne didn't tell me about it in his book.
Anyway, around 1980 or thereabouts I saw an advert in the CTC magazine for something called a Super-Link or some such. So I sent off for one. It was like a modern quick link - almost. There were two "rivets" permanently attached to one plate, that had threaded holes along their length. You screwed the other plate on with little screws. No more bashing and peening, or subtle fiddling with a chain tool. What bliss.
Now that those weird Shimano snap-off rivets seem to have gone away it seems that the victory of the quick link is complete.