Is all instant a Polaroid? Is every copy a Xerox?

I always find it curious:
how we are seduced by nostalgia
anything that seems "better" is remembered fondly
coin things based on most prevalent tag lines
that the "grass is always greener" ...

Yes - a couple PA teachers are using 4x5 as a tool. Some do it early on, others wait until later.
Yes - they are using Fuji instant film.
Goes with the instantaneous nature that digital gives.
Polaroid has gone out of business. A company did buy up many of its assets and I really don't know if it is back in business or not.
Kodak spent many years making instant film as did other companies.

Haloid made the first copy machine (there are still a few in use in the Rochester area by local artists) and then it morphed into Xerox/Haloid and then simply Xerox. A xerox is a company, not a copy of something.

our culture tends to adapt language as we see fit.
Coin a phrase to suit our needs.

Hence
all copies can become a "Xerox" when it is really a copy - photo, electrostatic, laser ...
All instant analogue images can become a "Polaroid" when they are an instant, analogue,  image...

here is the link  for the Fuji instant film or "FujiPolaroid" datasheet
http://www.fujifilm.com/products/instant_photo/pdf/fp_100c_datasheet.pdf