Is there something different about smart bulbs? My oldest hue is at least 6 years old, but probably older (as I can't find the order confirmation for the bridge

Is there something different about smart bulbs? My oldest hue is at least 6 years old, but probably older (as I can't find the order confirmation for the bridge, so I'm guessing I bought it offline), no flickering, no getting darker. Logically, I'm thinking that the pure LED components are a much smaller part of the price, and that maybe there is less skimping?