It's been around as a fad for several years, and now seems to be fading. I still don't get the fixie thing. Now, I don't want to be judgemental, everybody has a right to get thier bike on. However(comma) it seems that limiting your efficiency by only having one gear makes no sense. If you like the "reliability and efficiency" of the drivetrain, running an 8 speed Alfine or SRAM essentially does the same thing. No brakes? A recipe for ending up in the hospital. When I was a kid, I thought multi gear bikes were awesome. I could ride up a hill without getting off and walking. When cantilever, then V brakes came along, I was overjoyed. You could actually slow down and stop without killing yourself. These things having greatly increased the useability of bikes without any real drawbacks. One thing I DO lament is the compartmentalisation of categories of bikes. Off road(and on) bikes going to integrated headsets, different front axles, etc. are not going to bode well in the future for ones wanting to rebuild a bike. But al in all, there have been a lot of good things in the past 40 years.