Having something like a sound system, theater projector, or smart home features installed in your home can seem luxurious and useful. Instead of having wires running everywhere, it’s all neatly hidden away, and access to inputs and controls is convenient and easy. And a “smart home” can feel very modern while offering real benefits in terms of efficiency and control over your environment.
The problem is that potential buyers may not have the same needs as you, and electronics baked into the walls of the home might be wasted on them, or might become outdated over time, becoming not just an eyesore, but an eyesore that doesn’t even work well. In other words, built-in electronics can appear as future bills to house-hunters, because they immediately estimate how much it will cost them to remove and/or upgrade them.