Several problems with LED bulbs.
They are very expensive.
The transformers they are building in the bases of the bulbs are often poorly made, and will rust if exposed to moisture.
The bulbs tend to lose their brightness quickly. A LED bulb won’t burn out, but it quickly becomes so dim you will need a flashlight to find it. They are guaranteed not to burn out, but that doesn’t cover dimming.
Agreed! So they use a transformer... how to the get the 1VDC or so? Seems half baked to me.