A sad and unexpected passing, to be sure.

The Sentinel didn't have a greater impact on the larger world (or fandom, for that matter), I think because it was on a small netlet, UPN.

Which makes it even more remarkable that it developed such an active fandom--multiple email discussion lists, bunches of fanzines, lots of 'net fiction, some conventions and other fan gatherings, etc.

And there still is plenty of that out there so, along with the DVD sets, it's never too late to get into the fandom. :-)