CFLs were crappy and full of heavy metals, Halogen was half-assed, LEDs were expensive, too blue and too weak.
People were defending their radiant heaters in full force, but everybody underestimated exponential development in a market suddenly put into full force solving this.
By the last stage where 40W bulbs were being phased out, nobody was interested in them anymore, because LEDs were simply better with cheaper TCO.
Solar and battery are still on exponential track down the cost curve (with wind saturating, but still going strong).
Nuclear and fossils are not.
The energy world will look very different 10 years from now.