I say don't believe the hype, unless you just need the basics.

For me Biome replaced Prettier but its linting capabilities are nowhere near the amount of rules available for eslint. They mention having rules from ts-eslint and unicorn; then you check and it's a handful out of hundreds of rules among the two plugins.

So it's fine if you're using a basic eslint config, but you miss out on a lot of powerful linting otherwise.