Are there any statistics how many people perceive this flicker? I see them complain in online forums but I'm not sure if it's just a very loud small minority.
What does it take to make them not flicker? I.e. how much of a cost increase is required?
Based upon this article were the retail costs of a cheap flickering LED bulb is approaching the single dollar mark, the cost increase to use a proper AC/DC converter could be orders of magnitude more expensive (at a rough minimum).
Honestly it's starting to feel like a most cost effective long term solution is to build homes with a master AD/DC converter (or several depending on sq/ft) and simply wire 12v outlets and light fixtures. The energy savings of swapping all incandescents or compact florescence bulbs with cheap LEDs with cheaper power converters is starting to scare me knowing just how shoddy and fire prone some of these power converters can be.
What does it take to make them not flicker? I.e. how much of a cost increase is required?