but pageload based frameworks abstract almost all of that mess away from the developer, where was an SPA has less of that mess, but a bunch of different messes.

but pageload based frameworks abstract almost all of that mess away from the developer, where was an SPA has less of that mess, but a bunch of different messes. I don't advocate for pageload-based frame works (asp.net webforms, cf, a bunch of roll your own phps, etc), and I believe a lot of the vendors of them have been kind of moving away from them toward a more bare-metal HTTP approach, but that doesn't mean they don't have a place. In RAD and click and drag IDEs that large corporations prefer, you can hand a single Junior level developer a requirements document, and expect them to be able to build a back-office type application.