The common ‘outside the Valley’ counter-example: Fortune 500 intranet-based workflow, integration and data visualization applications.
- There is no desire for SEO.
- The applications are designed to be like desktop programs that can be easily shared across a large organization.
- Integration with a large number of in-house systems that must be supported and run the gamut of what you might call ‘extreme legacy’.
- While things like Flex/Flash were used for this to some extent in the past, security concerns and dwindling browser support have more or less mandated JS at this point.
TLDR: There is a big world of app development beyond the linkable consumer web.