As to why others don't use Corian (or nairoc) and this is just a guess:
I was quoted $22.50 per square foot for some Corian (retail price) for a 12
inch by 24 inch piece. YMMV, but about $50.00 for a router table top seems
a little steep. You were lucky I didn't know about that auction you were
at. $5.00 !!!!!! Dang IT all.
Oh, BTW: when you do use a power tool on Corian (or non-DuPont look alikes)
please use a dust mask.
MSDS for Corian (specific to DuPont's trade named product Corian, not valid
for other mfg.)
Free woodworkers pamphlet at Art Specialties International, Inc.
"How to Work with Corina in the Homeworkshop"
scroll down and click on link Free Stuff.