It’s still being made, though.
After several sequels, a prequel and a different TV series, Kevin Bacon is returning to the Tremors franchise. After 27 years, a new TV series about the giant, killer sandworms, known as Graboids, is heading to TV and, after some months in limbo, it looks like the project is headed to SyFy. The network is going to make a pilot and, if all goes well, the new take on Tremors will go to series for at least one season.
I noted back in September 2016 that this show was going to be on Amazon (yay!) and would be retconning (boo!). It looks like this version is going to instead going to go see what Bacon’s character is doing now, twenty-five years on: which would mean no real need to retcon. As one of the people writing on this noted, this is a series about people shooting giant worm monsters. There’s not much in the way of contradictory canon to work around.