Just because I have had issues with the last sets (plural) does it mean
everyone else will. Nor does one person who hasn't had any problems mean
no one else will...there is no absolutes in life other than I will die
There are many, many factors to why they crack to not crack.
In my circumstance, they cracked (the last five sets, IIRC). Even my
ex's lux sedan had them crack and she moved to another area and is
always garaged
My nephew's 2007 2500HD 4x4 Mega Cab CTD has his 3 year old Michelin
LTX-AT's crack on the sidewalls. He didn't have time for me to take
pictures and has change them out already to Toyo's
His looked just like this (from my vehicle)

Another set (AT's)

I go through tires quickly, both from mileage and from my severe driving
style (boy race to the core and think/hope till I die)
Here are a couple links to old posts showing my Michelin's. Both
LTX-AT and LTX-MS
Best tires for my 1999 suburban K2500 Junk BFG Tires