Originally Posted by HLing
Is it safe to say that Compur-Rapid shutters are found mostly in folding cameras only then?
Probably so -- but I would stress "mostly," as I'm not enough of an expert. I see it's also used in some TLRs, for example, of which I know very little.
Around the time that folders fell out of fashion in favor of rigids is also when the Compur-Rapid morphed into the Synchro-Compur, but the transition was probably more complicated than that.