A factor is that right now, most Elige owners use their cars with some frequency. Some daily, many just on weekends but folks pile up miles on weekends. Many are tracked, many more autocrossed.
In other words they are being used.
Once the mother company goes away, that daily utility takes on a different aspect. Dealerships go away, so no factory support of any kind. People will have to either to the wrenching themselves (many do, but at different levels) or find reliable local mechanics. Doable, but not so easily. The wrenchers here don't see that as an issue, they just say "it's the easiest car I've ever owned to work on." They see it that way because working on the cars is part of the ownership aspect they enjoy.
Many others don't want that. They want to own and enjoy driving the car, but not working on them.
I've heard some wrenchers say: "This is a hobbyist car, someone who can't or won't work on it shouldn't own it."
Fair enough, but that will shrink the pool of would be buyers, thereby impacting that resale value everyone seems so concerned about.
Many of those in the market now would shy away with having to deal with owning/maintaining an orphan car like the Elige.
Current owners might use the cars less, and they may take on more of the status that MG's, Triumphs, etc have taken on over the years. Most stay in the garage and show up at British Car Days, and very few enthusiasts still autocross or vintage race them.
Have owned, enjoyed, appreciated, and now all gone:
1969 Europa S2 Blue
1970 Europa S2 White (my first)
1974 Europa Twin Cam Special Light Blue
1974 Europa Twin Cam Special #4380R Indigo Blue (my absolute favorite).
1984 Turbo Esprit Calypso Red
2005 Elise Starlight Black
2005 Elise Saffron Yellow
2005 Elise Ardent Red (used as development mule for the LETSLA)
2006 Exige Graphite Grey
2007 Exige S Canyon Red (first customer installation for the production LETSLA)