^maybe because they did almost nothing beside that?
Now, now, IMBD has David acting in 62 projects and Gillian has acted in 29. Not too shabby, when people like Tom Cruise and Cameron Diaz have 35 a piece. Even Kirsten Dunst, who gives the impression of being in every movie made, has only appeared in 57 projects.
Not that everything else they did was good, not by a long shot. But they were out there. And while I think Duchovny really only shines at playing Mulder, Anderson turns in some heartbreaking, magnificent performances in things like Bleak House, and The House of Mirth. She's excellent in those period pieces.
That said, this is probably going to be a disaster, and I'm a true X-Files fanatic (seen every episode of seasons 1-7 at least 20 times, more for many - going to wear my dvds out eventually) and I'll be in the front row for the first showing. Probably see it more than once in the theater. But I'm not kidding myself about the quality.
X-Files was a show that should have died at the end of season 6 if it wanted to go out on a high note. A strong case can also be made for ending it with season 7, and going on to do a series of movies. Seasons 8 & 9 had the same title, but they weren't The X-Files, because The X-Files were never about the cases. It was a show about Mulder and Scully and their personalities and relationship (not necessarily in a romantic sense, I never 'shipped them). The cases were an incidental framework. Nothing against Doggett and Reyes, they would have been fine in a spin-off or something, but you don't take the heart, and eventually soul, out of a show, and then be surprised when it flounders and dies, and long-term, hardcore fans speak with bitterness and frustration at how it all turned out.
Anyway, I'm looking forward to it in the same way I'm looking forward to the new Trek movie - with excitement, trepidation, and a plan to have a few stiff drinks first.