The most difficult hotel technology decisions to reverse are network infrastructure, in-wall cabling, power placement, HVAC control architecture, and system integration frameworks. These elements are foundational and often hidden behind walls or ceilings, making changes disruptive and costly after installation. Choosing underspecified networks, incompatible wiring, or closed systems can limit future upgrades, restrict vendor flexibility, and force premature replacements. Proper upfront planning ensures long-term scalability and avoids expensive rework during future renovations.