Replies like this are always interesting to me. It seems like you're saying these "overengineered" JS frameworks are useless, but I can't believe thats the case. You must just be saying they don't fit your use case, correct? If so you are not getting that point across very clearly.
Otherwise are you honestly saying you can't see the use case for these frameworks? You would rebuild Facebook with static HTML and a sprinkling of js? You believe all these very smart people who created, worked on, and use Angular, React, Vue, etc. are just way off base and should go back to your method?
There is a story called The Emperor's New Clothes, the morale of that story is that you should question your decisions and not blindly believe what other people say, even if you look up to them.
When I saw the "light" about React, me and friend were coding our own e-commerce system each for fun. Him with Ruby and Rails and jQuery, me with Grails and React. When we implemented the shopping cart, I wrote like 200 lines of code in React that would dynamically update that shopping cart. My friend did it with just 5 lines with jQuery. Yeah most of my React code was boiler plate, but still...
What I do, is not at Facebook scale, complexity or size. I have no idea about how challenging their issues are technically. What I do know as a user of Facebook though, is that Facebook is annoyingly slow these days, and makes my Macbook pro fan spin at full power.
You are comparing apple to oranges. Why use react or angular or vue with fun hobbyist projects meant for a team of one developer that is going to throw that code out and move on to another hobby.
In the real world you're going to have to come up with a homegrown vanilla approach for all the things that a good framework does for you: escaping user input, provide setup and cleanup hooks for your DOM manipulations, maintain state and I'm not even touching routing because you seem to be focused on server-rendered apps although the community does prefer hybrid apps that start out server-rendered and load more data while the user is browsing.
I've worked in companies that started out homegrown and it's a bitch to maintain, evolve and for that matter teach to new hires.
