I regularily receive dmarc reports from Google (every day) and yahoo for instance. Not sure I've ever received any dmarc report from hotmail though.

And email is pretty reliable with Google. It is a disaster with hotmail: you have to send a big number of emails to have a chance that hotmail treats your email as non spam. They put your self hosted emails in the spam folder of your regular contacts, and the fact that they respond to your emails and systematically mark them as non spam is an irrelevant detail for them.