That's why, as you know, solid copper is recommended.
Sure, but sometimes switching out coax isn't so easy. I was over a friends house a few years ago in January watching football and he'd experience signal loss for 10-15 seconds a few times an hour. He said it had been doing that the last week or so since it got really cold, and just assumed the dish had problems with extreme cold.
Turns out he'd trenched about a 100' run to the closest place with a clear view of the sky when Directv wouldn't do the install, and used CCS since that's what Lowes sells. I told him to order a PI29 off eBay and see if that worked, and it cured the problem for him. Even if he was willing to dig a new trench and run the right coax that wasn't going to happen with snow and frozen ground.