What can ESLint do without plugins?

Question

JavaScript

We need to migrate the project from TSLint to ESLint.

In all the guides that I have looked at, ESLint is being used with various plugins.

Questions follow from this:
is ESLint still a linter + formatter or just a core, on the basis of which everyone makes their own implementation of the rules as they want?
What can pure ESLint do without plugins? In this form, can it only help writing js code or something else?
Does ESLint support linting Typescript code out of the box or only with plugins?

Answer 1

https://eslint.org/docs/rules/ - no plugins
TS needs plugins, at least a parser
https://github.com/typescript-eslint/typescript-es...

Answer 2

ESlint without plugins can lead to a nervous breakdown.