The CDW92 model has changed for the worse

I use this workbook for about 10 years.
Since that time, I loved the perforated pages
who turn very easily thanks to two plastic rings.
I could add pages (100cd total).
Advantage: Dial 1 100 per bag and replacing a damaged page
when needed (that never happened)
Surprise: now CDW92 the pockets are sewn, which removes all the above benefits.
But I thought Case Logic has filed a patent on this model?
This is a regression, no doubt!
Too bad.