It wouldn't be an issue if other work tools were taking absolutely nothing yes but as it is now, 16GB of RAM with a JS oriented stack isn't enough anymore.
And getting more RAM is just delaying the problem anyways since it takes more RAM every week as the product evolves.
During development vite has HMR and you don't need to run build after every change. This is no different when using SSR.
But I don't want to further argue. If you think that SPA is not suitable for your use case, that's ok.