While Hollow core doors are less expensive, lighter, and easier to install, Solid core doors have a higher perceived value, are a more quality and durable material, and are much better at insulating sound and heat.
Considering that Solid core doors serve both aesthetic and practical purposes, they increase more value to a home than their hollow counterparts.
In case you are planning to sell your home soon, installing Solid core doors will be a smart move that will attract more potential home buyers.