I have never seen any Apple computer with a volume less than 0.5 L.

The volume of a Mac Mini is 1.4 L.

A Mac Mini is huge in comparison with a classic slim NUC and it has a double volume in comparison with a tall NUC or with a Skull Canyon NUC.

At the size of a Mac Mini it is trivial to cool even a 65 W CPU, because that is possible even in a smaller 1 L case.

So no, what I have said about Intel is correct.

And as a bonus, "You cannot get your money back because the computer is not defective, it is just different from what you expected" isn't true for them; you can return for any/no reason in the first two weeks.

That is also not true for any European customer in general. There is a 14-day return period without any questions asked on any product barring a few perishable/date sensitive/hygienic concerns.

> in general

The 14 day return period doesn't apply to in-store purchases

(not trying to argue btw)