Have you ever developed a technology that initially appeared to fail - and then became successful?

A recent IEEE Spectrum post Xerox Parc’s Engineers on How They Invented the Future reminds us that important inventions are often waylaid before later becoming successful.  
  • Have you ever developed a technology that initially appeared to fail - and then became very successful a few years later?
  • Has your employer ever developed a technology that initially appeared to fail - and then became successful a few years later?
  • Why do successful technologies so often appear to have failed - before becoming successful?
  • What would Dilbert have to say about this? ;-)