I'd like a reboot, if they did it right.
BUT
If they didn't do a reboot, if they had a continuation of just Seasons 1-2 while ignoring S3-S5, then you could have a situation where the Sliders missed a slide and were stuck on a particular world for 29 years.
1996 + 29 = 2025
It would line up perfectly. Everyone's moved on with their lives for the past 29 years, they've established themselves on the world they're on, and they're at point where they're wondering if they want to leave. Something would have to happen or have to have been happening to make them want to slide again. There could be a story there.
Just treat Sliders Seasons 3-5 like it was following an alternate version of those characters.
If it were just a one-time special, I'd like a what I described above. If it were an actual series, then I'd prefer a reboot.
A reboot has limitless possibilities. Imagine a world where Gore won in 2000, or if Covid was worse than it was, if Trump hadn't been elected, if the Internet didn't take off, if we had flying cars, etc., etc. etc.