Based on an article in "Skinned Knuckles" a very fine restorers mag, written by restorers, the late 80s cars will be the last of the restored breed unless its a real labor of love. The later cars have a multitude of plastic parts individual to each model, wiring looms built into the unibody that can't be replaced without cutting, much less parts interchangability. and many more components than the earlier models. Just the tear-down of a 90s with photos and cataloging and bagging took 4 or 5 times the time of a 70s model.
Plus 90s models don't sit in a junk yard for 20 years for extra parts, they go to the crusher pronto.
Of course, there will always be the labor of love and unique and rare cars after the 80s that will that will be restored but the above difficuties will increase costs and time required to discourage the hobbiest restorer.