Disagree. The best mirrorless cameras, say A7iv/A1, are a lot better at focusing than any DSLR. Not only do they focus accurately, but they have eye-detection A

Disagree. The best mirrorless cameras, say A7iv/A1, are a lot better at focusing than any DSLR. Not only do they focus accurately, but they have eye-detection AF. Yes, it will take slightly longer for them to give you the AF confirmation in some scenarios, but that's because they only give focus confirmation when it's actually perfectly sharp on the sensor. No DSLR can do that, because of the way dedicated phase detection sensors work. As far as battery life, you're right, but now that battery banks are a thing I don't think it's a real issue for those days you're going to be shooting for 4+ hours, and otherwise they're just so convenient to charge by usb-c