That's true, though Philips has taken steps to improve the lifespan of their Xtreme bulbs. For example, the glass capsule is much smaller in diameter. That means the glass gets hotter/quicker, which means the halogen cycle starts sooner and operates more efficiently, thus boosting filament life compared to a larger capsule. The lifespan of an Xtreme bulb is, in my experience, about equal to the lifespan of a 64205.