So would you guys say it's inevitable?
No.
However, as my prior posts summarizes, whether or not a HuCARD sleeve will deteriorate into sticky goo is combination of...
STICKY FACTOR = (1) materials (not all sleeves are exact same material, from same manufacturer, from same lot) + (2) exposure to heat/humidity/other elements + (3) LOVE (or lack thereof)
I would not be surprised if other sleeves become stiff/dusty/cloudy/etc.
SOFT, MALLEABLE PLASTICS/VINYLS do not age as nicely as hard plastics...
AT LEAST THIS ISN'T FOAM we are dealing with. FOAM DETERIORATES QUICKLY AND HORRIBLY compared to other materials.