Slabs can be hard to walk on, colder in the winter if the heat fails, they can sweat in hot humid weather causing tack strip to rot.

Over time, the subfloor secured by the old nails starts to loosen through natural conditions (humidity, change in temperature).

Back in my days of electrical eng courses we studied the concept of arcing/creepage caused by mediums such as humidity &/or surface dust/corrosion.

And also figured the Texas 98 degree heat and humidity would probably motivate them to move on   

@Josh PrihodaI would turn on the electricity, and make sure everything works while maintaining the correct temperature and humidity in the unit.

"South Floridian" here who isn't a big fan of this hot and humid weather!

High humidity, so they work well, buy they wear out faster than some other areas. 

We remodel a lot of old bungalows here in west Florida, decades of humidity and termites are not kind to them.

When I spoke to tenant he informed us that they set it up on 74 degrees but it was cold during the time so conditioner might not get turned on and therefore humidity got to the point that carpet absorbed the water. 

It wears like iron, BUT, if water gets into into it or in high-humidity conditions, Pergo swells and cracks.