Everything mechanical is
Everything mechanical is susceptible to failure. Eventually water pumps, hoses and power steering pumps leak. Belts give out. Sensors fail. Manifolds need to be tightened. A/C systems leak. Modules fail. Engines and transmissions develop oil leaks. Connectors get corroded. The worst thing that engineers can do is locate an engine in the center of the car to create unnecessarily complex and difficult repair and maintenance problems. Turning 2 hour jobs into 2 day jobs is not a good idea... Probably have to drop an engine out to change a water pump gasket for instance.
And people will care about that - even if they have a warranty. Ordinary independent garages may not be able to work on these things. If every little thing that goes wrong with these cars requires an overly difficult and complex procedure to fix them (drop the engine again), dealerships will be overwhelmed with the backload. Owners will get pissed off waiting a week or a month to get even simple problems fixed because they'll be waiting behind the other 4 C8 Corvettes that need their engine dropped out to fix simple stuff. A hard to service mid-engine car design is just that - can't mislead me with marketing and hype.
Plus the C8 will not perform any better than a C7 on the street - even if driven enthusiastically. Only driving the two on a professional high speed race track might (?) reveal any possible difference. A slightly better driver in either one of the cars would make all the difference.
The "happy" articles we see just because a car is "new and different" remind me of the hype that preceded the C4 in 1983 - which objectively turned out to be quite a dog.