It's a lot simpler for sure these days. I've built my indie startup with Phoenix Liveview. It's all server side rendered, with liveview sprinkling in interactivity.

Can you tell it's server side rendered? https://www.gamedrop.gg/lists/slymilano/exciting-game-releas...

https://www.gamedrop.gg/game/hogwarts-legacy

I think there are similar tools in other platforms like Rail's and Laravel.