Oh I hear you Dave, trust me. You obviously have no way of knowing, but I am a wheelchair user most of the time due to a motorbike mishap a number of years ago. So my arms are occupied with propelling me, and that big cannon hanging off my neck for 8 hours is just not a good thing for me. I use it when I can park my car and set up my tripod, but for a moving environment, I just can't carry that much gear with me.
I am looking into a modified Segway that may significantly change things in the future, but for now, it is what it is.
And yes, the IQ and speed of that lens are totally amazing!