isaacwrongSony is the future though in terms of what they have been putting out each year. Panasonic has the GH5 and SH1? And the gh5 is mad old lol. People will say that sony is not a filmaker camera but if you rig them up with a cage and handle it's fine, yeah lcd's kinda blow and batteries suck on apsc but get an external monitor and you'll be set. Sony's new A7C looks sweet too, in between the apsc and full frame body size. Sony checks the box in terms of native glass as well. Panasonic you'll want to invest in some canon glass and a metabones. Sony is the way in terms of upgrades too super easy. My opinion: Buy a used camera body like an A7SII and two really nice pieces of glass
I wouldn't say a camera has to be "new" to necessarily be good. The gh5 is still unmatched for the price IMO, 4k60 with sensor stablization is pretty great for anything involving skiing. The only real reason to get an a7 would if more then say 20-30% of your shots need good low light, then sony is a no brainer. The LCDs and batteries dont just suck, they're downright trash and not everyone wants to rig up a camera with a battery pack and monitor, which is why I think the gh5 outshines it in this fashion.