If you’re working on a reasonably sized project “without a framework”, and haven’t effectively built your own, I’m very skeptical of the engineering practices at play.
Not using a framework doesn't automatically imply everything is built from scratch. Maybe I prefer calling libraries, instead of plugging my code into a framework. I could also implement patterns using the batteries included features of the platform. For example Web Components on the frontend, or a REST API on the backend built using the standard Go "net/http" package
Maybe Vue and Svelte are different. But something like react is "just a library", right? So they must be greenspunning their own framework as well, by their own admission.
So then ask yourself the question - which underlying tech of your in house framework is going to be more stable, supported, have better tooling, and be easier to reason about. I'd pick the DOM every time.
