I've only experienced him polite and responsive. That said, maintaining Keras must have been an unhealthy amount of work for one person, and I think OSS develop

I've only experienced him polite and responsive. That said, maintaining Keras must have been an unhealthy amount of work for one person, and I think OSS developers in that situation deserve the benefit of doubt that being brusque or ignoring issues is not a character flaw, but a defense mechanism to keep their sanity.