> If you have the option of writing an SPA, it's simpler quicker to build this way, and so easy to deploy.

It's simpler if you only write the front-end, because it de-couples the work with the back-end.

If you are in charge of both front-end and back-end, server-side rendering is easier.

It's a case of Conway's Law. Knowing that, you may choose to have a back-end team and a front-end team or a team of full stack developers depending on the end result you want.

Personally I think it depends on whether the Web is just another client for you, which consumes APIs like native applications, or if your product is entirely web-based.