[Python] Does FastAPI still need Gunicorn?

For a long time Gunicorn+Uvicorn was the default setup for running FastAPI in production. However, I recently came across a blog post saying:

In the meantime, this combination of Gunicorn and Uvicorn is no longer needed, as Uvicorn now also handles worker management itself
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I haven't found any other sources to verify this statement. Beside this, the official documentation only mention that the tiangolo/uvicorn-gunicorn-fastapi base Docker image is deprecated, but say nothing about Gunicorn+Uvicorn setup itself

So:

1. Does modern FastAPI need Gunicorn?
2. Is there any difference between fastapi run --workers 4 main.py and gunicorn main:app -w 4 -k uvicorn.workers.UvicornWorker now?

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