I was thinking that, more than a bunch of convenient abstractions, a framework also provides a convention that developers are familiar with (easier to get into

I was thinking that, more than a bunch of convenient abstractions, a framework also provides a convention that developers are familiar with (easier to get into the codebase). I feel like I know how NextJS projects will be structured. I'm just a beginner developer, and I would actually prefer vanilla ES6, but I can picture wildly different ways of doing things with ES6 between each company. So then each company has their own abstractions, libraries and conventions (aka a framework, but localized). Then I imagine documentation about the structure, to get new devs up to speed. When the girlfriend had to switch to Angular from React at her junior position, it took her a while to get comfortable with the codebase. Not sure how much that matters amongst experienced developers.