The 330 is no slouch, reaching 0-60 in ~5.1s.

It’s honestly probably quicker than the 370z unless OP is beating the shit out of the manual transmission to minimize shift times.

So basically just as quick, far better fuel mileage, far more practical with the rear seat and trunk/boot.

You are right, that is an unpopular opinion.

The M8 is a great car, but the 911 is hand-down the better option when looking at the entire ownership experience.