The thing that kills me with this, is that it must be such a pain in the backside to build, scale, and manage. I'd love to make use of these technologies, and I work for a suitably large organisation - but I'm not a one man army and this requires a serious team with some serious depth to it, invested time and remuneration overheads.
How do I handle users, roles, permissions, application logic, database, forms, content, publishing, etc? Wordpress. It may not be in vogue, but its all there and I can deploy it pretty quick.
Is there a solution I can pick up that will run as a static site, make use of serverless, and not take forever to build out?