I feel that the discussion about hybrid technology in F1 gets muddled in the discussions about viewing figures and the current engine noise. The relevance of hybrid technology in F1, not just about the current engines which are only the first implementation, is surely worth a discussion on it's own merits.
Switzerland has just mandated that motorsport is legal once again, albeit only for electric vehicles. This is a huge step in reversing a 60-year taboo, one which has repeatedly been upheld by the Swiss legislator over the years on environmental grounds. This was not possible without the rise of Formula E and effectively, hybrid technology becoming the motorsport mainstream.
Alas, the discussion can't really be made without referring to the broader world, either. Climate change is settled ground in the scientific community, and it's only really self-interested parties in power that prevent anything being done about it. So surely it's left to the engineering profession to find the solutions to global problems.
These two factors suggest to me that if F1 wants to remain relevant both politically and in engineering terms, surely hybrid or other forms of green technology are essential to it's long-term survival. I'd quite like to hear the concrete reasons why some believe it isn't.