Containment solutions are generally considered future-proof, but practical limits should be considered as power densities continue to increase. Fully air-cooled environments may eventually approach the capacity limits of a standard 1200 mm aisle. In higher-density scenarios, aisle widths may need to expand to 1800 mm or even 2400 mm, requiring adjustments to the containment system. While some panels can often be reused, others may need to be replaced. 

Alternatively, hybrid cooling strategies - such as liquid cooling, rear-door heat exchangers, or direct-to-chip cooling - can reduce the thermal burden on the air system. In these designs, air cooling can continue to manage the remaining heat load effectively. 

Ultimately, the long-term suitability of containment depends on the total rack power, heat density, and the cooling strategy implemented within the space.