Good points but I don't think witholding progress to support these services is a good idea.

The solution is to come up with best-practices and tools that allow both interactive and static versions to exist in tandem, with minimal overhead.

Catering to lowest common denominator means technology, for all humans, lags behind. This is a massive issue. Either the tools for consuming static content (e.g. google bot) need to evolve to embrace the modern internet, OR we need to produce simple tools for dynamic sites that transparently serve the static content for services that require it.

That said, there's a lot of simple elegance in a straight html page.