People debate SPA vs SSR without any context. Both have their use case:
Everything before a login => SSR, everything after => SPA.
Why? SSR is proven to be much better at SEO. But SPAs offer best UIs. Nobody wants to click through stuttery SSR dashboards in 2019, wait for page loads, submits, etc. People prefer slick UIs, that was one of the reasons DigitalOcean got big (because of their then stunning dashboard or after-login-experience [1]) and hence every other hoster copied their interface.
[1] DigitalOcean's dashboard experience was for a long time the main teaser (as an animated gif/video) on their landing page.
Everything before a login => SSR, everything after => SPA.
Why? SSR is proven to be much better at SEO. But SPAs offer best UIs. Nobody wants to click through stuttery SSR dashboards in 2019, wait for page loads, submits, etc. People prefer slick UIs, that was one of the reasons DigitalOcean got big (because of their then stunning dashboard or after-login-experience [1]) and hence every other hoster copied their interface.
[1] DigitalOcean's dashboard experience was for a long time the main teaser (as an animated gif/video) on their landing page.