We bought a '17 Z51 for my wife in March of '18. It's an awesome car. Great ride, incredible handling, and very well made. The paint quality could be better, but they upgraded the paint shop at the plant after ours was made. With 460hp on summer tires, it's a handful on cold tires. I like it so much that I have considered trading my Scat Pack for one of my own. Then I drive the Scat Pack and realize that a paid off Challenger is probably better than a second Corvette payment
The HUD is a very nice feature. Especially with the 7 speed manual as it also shows what gear you are in.
We paid 52 on a 69k sticker price. So, if I had paid MSRP, depreciation would have been a serious hit. However, between dealer discounts, rebates, and bonus cash, I felt the first year's depreciation had been accounted for by the discounts. A year later, the same dealer had a used one exactly like ours except interior color on their lot for $54k.
As for the C8. I doubt we'll get one. But, except for the rear, they're very, very nice. I really like that the C7 cargo area is only 1 cubic. ft. smaller than the Challenger's trunk. I'm not sure of the utility of the cargo compartments in the C8 since there's one in the front and one in the rear.
The media makes such a big deal about the C8 being mid-engine but the writers forget that the C7 is a front mid-engine. The C8 is rear mid-engine. Honestly, I prefer the look of a close-coupled front-engine coupe. But the C8 is a solid design.