I have a 2011 Ram 1500 in NW Iowa (rust belt) and no issues with broken exhaust bolts.
My son's 06 Jeep Commander 5.7 did break some exhaust bolts, but we got them fixed a couple of years ago and no problem since
My other son has an 06 Chrysler 300C with no broken bolts or issues

JS

76 Dodge Adventurer Sport Power Wagon W100 318, 727, NP203 Fulltime 4x4 Russet Red
06 Chrysler 300C AWD 5.7L Hemi
10 Mopar 10 Challenger R/T, #483/500, 5.7L HEMI
10 Jeep Grand Cherokee Ltd 4x4 5.7L HEMI
11 Dodge Ram 1500 LoneStar Quad Cab, 5.7L HEMI, Fulltime 4x4, Deep Cherry Red
16 Jeep Cherokee Limited 3.2L Pentastar V6, 9 Speed Torqueflite, 4x4, Black
24 Jeep Gladiator Rubicon X 3.6L Pentastar V6, Fulltime 4x4, White