Are you uggesting we don't have give up fossils that quickly, or are you suggesting we could wait 19 years and then shut down fossil fuels with a large change which would bring cheap fossils replacements for even third world countries?
I do favour ramping down incrementally, and we should get started ASAP.
I'm suggesting that instead of waiting for dramatic political and/or economic changes I will support every opportunity we get to move in the right direction, regardless of how small those changes are. The key in my opinion is building momentum. Research into clean technologies are likely to pay off eventually, even if the changes in the near term are negligible.
Remember that the best way to predict the future is to invent it. If you truly want your revolution, then lead the way by action. I'll continue supporting change in my own way.
I do favour ramping down incrementally, and we should get started ASAP.