First, my congratulations on the weight lose. Before I retired I started my weight lost without anything from the doctor. My hat is off to you for doing in 6 months what has been three years for me.

My only reason for suggesting 4/3rds to SunnyDays was because of her statement, "as I age I find the canon d60mll heavy". I also suggested possibly a bridge camera as well as 4/3rds. Both are lighter than full frame or APS-C. I personally think she would be happier with a system where she can change lenses as needed and buy lenses as needed. The Sony RX100 and RX10 (and other brands) are great cameras but suffer more than 4/3rds in low light and would require buying a new camera if one wanted a different lens range. You are right that there are very good reasons for your suggestion of the Canon RP. But that would assume that SunnyDays intends basically to carry the same weight camera system as she does now. Yes, 4/3rds is a change of format. But the change of format is to meet a new and increasing requirement for SunnyDays.

As far as I'm concerned, I cheated. I realized I was getting older and knew that weight was going to be a concern in the future. That is why I went 4/3rds back in 2011 rather than go full frame. And I have no regrets. And I think if I had become a serious professional, I would have chosen full frame even as heavy as it is. My Hasselblad setup was 35 pounds as it was without any really wide or long lenses. I have no doubts that a full frame with the same angle of views of my present 4/3rds lenses would have easily surpassed that 35 pounds.

Again, it is only SunnyDays comment of, "as I age I find the canon d60mll heavy", that I suggest 4/3rds or a bridge camera for reasonable choices.