X-Pac and Ultra aging process will create crinkles/grid pattern, Ecopak bumps in the fabric over time, some times quicker, some times slower. These materials will also be affected by delamination, just like aquaguard / TPU-coated zippers.
The images below are from Reddit and here , first one is the AER CPP2 Ultra after 2 months of use, the 2nd one is the Able Carry Daily Plus VX21.
Ultra can also be affected by some extreme delamination, see video here: https://youtu.be/XsR2vojl7sk?feature=shared
Ecopak developing bumps, from Reddit:
While Aquaguard / TPU-coated zippers look sleek and nice out the box, they are also prone to delaminate.
Picture below from Reddit of the aquaguard zippers on a AER TP3