[runako]

> Modern web application is essentially 2 apps (frontend and backend)

This doesn't have to be the case, though. We all use e.g. banking & telecom sites that worked fine before being rebuilt using "modern architectures" and now are memory hogs. There is no reason many/most sites cannot go back to simpler architectures (other than programmers have forgotten how to build those sites, which is in fact a real problem).

I do hear the argument that when you start building, you don't always know whether this simple brochureware site will evolve into a multimedia player platform, so just start with the assumption you will need the capabilities of a complex FE stack. But in the majority of cases this will end up being the wrong choice, and clients/employers will end up spending too much money managing too much complexity.