I've had blinds for many many years. The Fabric has always held up to well to normal usage.
ie; set up for the week of the hunt then taken down, dried, cleaned and stored.
I have left some outback for a long time (Apr thru to Dec) and that resulted in the fabric getting bleached by the sun. That also makes the fabric brittle after 4-5 yrs.
The only damage I ever had to the screen windows was from Mice, Racoons and Porcupines eating it and of course shooting thru it. Never had one rip from 'age related' issues.
With these newer blinds, I'm sure that the fabrics used have only gotten better.