I started using SPD pedals and shoes years ago. I can still ride flat pedals but am loathe to do so. I absolutely refuse to ever ride a set of rat trap pedals and clips again..!
I do not like the impairment of the vintage look..,
but ride quality is hugely important to me. And keeping one's feet on the pedals is hugely important. So, I actually re-tapped the crank arms, on my Peugeot PX10e from French pedal thread to English. From now on, it is...
SPD for me, be they SPD and flat...
Or just SPD...
But, when hanging on the wall or on display at a local bike shop, originals pedals, with straps and traps, are just fine for my eye to behold...