docs(no-nested-subscribe): when not to use it

Author: JasonWeinzierl

docs/rules/no-nested-subscribe.md

@@ -30,3 +30,17 @@ of(42, 54).pipe(
   mergeMap((value) => timer(1e3).pipe(map(() => value)))
 ).subscribe((value) => console.log(value));
 ```
+
+## When Not To Use It
+
+If you need nested subscriptions and are aware of the potential issues,
+then you might not need this rule.
+However, you should typically prefer to use higher-order mapping operators
+like `mergeMap`, `switchMap`, or `concatMap` to handle nested observables.
+
+Type checked lint rules are more powerful than traditional lint rules, but also require configuring type checked linting.
+
+## Resources
+
+- [Rule source](https://github.com/JasonWeinzierl/eslint-plugin-rxjs-x/blob/main/src/rules/no-nested-subscribe.ts)
+- [Test source](https://github.com/JasonWeinzierl/eslint-plugin-rxjs-x/blob/main/tests/rules/no-nested-subscribe.test.ts)