Replying to Need to upgrade from a D700

Hey All - finally accepting that I need to buy a new camera (love my Full Frame D700...but it's time for a new camera for so many reasons) - figured i'd poll the combined wisdom of the NS photography community for suggestions. I've been out of the camera game for a while, as you can tell by my old hardware.

Seems like mirrorless is the name of the game - Sony and Pana/Lumix appear popular, either one recommended over the other?

I'll shoot a little of everything, Action / Product / Portrait

Anyone still shooting Nikon?

Appreciate the help - Cheers!