You missed other important key differences, NoSQL databases are very good but they have their use case. lack of standardization on NoSQL databases some of them do not support ACID transactions JOINs & aggregations are hard Also, schema flexibility may be a problem in the future if not handled correctly. I would like to add that query planners for SQL databases are really smart and mature, but I don't know enough about query planners in the NoSQL world to make a comparison.

jQuery is a set of utility functions, you first need to recognize the functions you really need from jQuery. So if you need: ... .ajax() ? there is the native .fetch ... query elements in DOM with $('selector') ? you can use document.querySelector or document.querySelectorAll ... event listeners? you could use the native addEventListener or a more lightweight library such as https://github.com/dgraham/delegated-events .... PD: I'm not saying jQuery is a bad thing, it is just that browsers and/or standards have evolved

take a look at native APIs that browsers provide https://developer.mozilla.org/es/docs/Web/API/Document/querySelector Here you can see almost all current broswers support it https://caniuse.com/#search=querySelector

You don't need to learn React or Vue to create a static website, you could do it of course, but it isn't that you have always to use them.

That's not true, React apps can also be deployed as static websites (after compiled/built), If your app connects to an external API that's another matter.

I use the free version of https://www.rescuetime.com

GitHub removed jQuery and they wrote about it here https://githubengineering.com/removing-jquery-from-github-frontend/ My personal thought is that it is not embarrassing but kind of unnecessary nowadays