I want to replace my smart light switch with a regular single-pole switch. Is that a simple swap?

Yes, it's often a simple swap if your smart switch was wired correctly. First, turn off the circuit breaker that controls the switch. Remove the smart switch. Look for a neutral wire, typically white, connected to the smart switch. If you have line, load, and neutral wires, connecting a standard single-pole switch is usually straightforward, following its instructions. If there is no neutral wire in the box, or if the wiring is confusing, call a licensed electrician. Adding a neutral wire, if needed, is not a homeowner task and should be done by a professional for safety and code compliance.