I think I'm going to go back to a crop sensor if the 90D / 7D Mark III offer a modest resolution bump, acceptable ISO, and improved dynamic range.

I've figured out I'm not willing to spend enough on camera equipment to really shoot full frame. I've enjoyed the 6D using it for 4 years now without an upgrade, but the 6D Mark II in my opinion is not a compelling upgrade and the 5D Mark IV is more camera than I really need.

I can't see myself leaving Canon because I like the lenses and don't want to lose all of the money in a system swap.

Dave