Guitars kept in a stand or hung on a wall are 10 times more likely to warp and crack. If a solid wood instrument is exposed daily to a blowing vent or hard sunlight it will warp and eventually crack and become unplayable. We have guitars 25 years old come into the shop that look and play like new because they were stored in a case. We also see guitars under a year old that are warped and forming cracks because they were stored outside of their case exposed to sun damage and dryness.