I think some to even most people would still call them "quill" stems, although "quill" is falling out of favor generally. Most people are just as likely to call them threaded stems to differentiate from threadless stems. At my co-op, we have a bin of threadless stems and a bin of threaded stems.

I would say the same is happening in terms of quill pedals. Most people are just going to classify them as clipless and platform or even just clipless and "regular" pedals.