Easy there tiger, React and others are compatible with server side rendering. They’re capable of being the “little bit of JS” on top. Everything will be ok.
There certainly is nothing wrong with going with simplicity over a solution that's overengineered for one's case, tiger.
It's good to hear that maybe when the time comes, I can dip into React by using it as the sprinkle of JS that jQuery / jqxWidgets and such were for me the last time I did any of this.