I think you are confusing base coat with solid colour. Modern base coat always has clear over it but solid does not.
Clear coat is no where as strong as a solid colour, to make clear coat optically clear means they can't use the strongest binders whereas solid colours because they are opaque can have very strong binders.
No confusion at all here. A friend of mine is a retired panel beater & sprayer who still does a bit of work, I've assisted him many times.
OEM paint on modern cars is base & lacquer, whether they are metallic, pearl or flat colours. The last car I had with a solid paint was a red Volvo, bought new in 1989, and the Rover that the other half had just after that was a non-metallic blue, and eventually suffered lacquer peel on the bonnet. Not had a car without a lacquer since.
The heat cured lacquers used by manufacturers are much harder than some old solid colours, and resist marking. Even 2-pack lacquers used for respray are far harder than the old polyurethane lacquers.
As equaliser says, perhaps they still use solid colours in your country, but here in Europe, I would be surprised to see any modern car without a lacquer.
Google shows Honda Milano Red as a base coat.
OEM Milano Red is a non-metallic base coat with lacquer.
Excuse my use of the vernacular when referring to 'lacquers', that's what we still call them here - I'm referring to 1K/2K clear coat.