Da nature and perception of subtle differences have changed over da millennia, and so a "newance" from one age would be a totally-obsolete "oldance" nowadays.
An aggravation caused by either (A) someone's being "stuck in da Stone Age" or (B) a comparably-obsolete device.
Many "ancient" ideas/practices are still a good idea in modern times, but we know now dat a lot of them are merely needlessly-arduous/restrictive oldsances.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.
We have a Zoom meeting in a few minutes and I’ll probably go pajama casual.