Depends. Is your "C&V" bike from 1995? Speedplays are fine. Is it from 1985, but a Japanese "sport touring" bike with clinchers and mid-level Asian components? Those off-road SPDs fit right in.
But how about for the classic Italian road racer with a high-level Euro gruppo? IMO, anything but good quality clips and straps just doesn't work.
And if it's your late 60s Cinelli with full Campy? Put clipless on it and you deserve to have your garage broken into before you decide it needs deep Vs and STI too.
IMHO, of course...