There are many new projects that involve Django / Drupal etc.

I myself have spent a lot of time weighing in the pro's and cons of SPA vs. Non-SPA for a recent project.

It's not like all new projects are SPAs.

Plenty of companies are building boring new PHP sites on Magento and making money without being SPAs. At least here in the Midwest, I've noticed quite a few non-tech companies moving their SPA sites away from being SPAs because it was the wrong technology choice for what the site does.