Running the tool is easy. Installing, configuring, and keeping it updated? Well, those tasks have taken up many lifetimes.
Replacing prettier and eslint in my projects will typically remove about 5 dependencies. Sometimes up to 10 if you have a lot of specific plugins.
Another amazing benefit is that because Biome is a compiled binary, it can run _without npm install_ which means you can use it in your CI for linting before running any expensive build steps.
Those things save me time.