You ask for A900/A850 firmware:
- The fanboys say, Why? There are no bugs, the camera works as expected, stop complaining.
- We actual owners watch as Canon and Nikon add features or make small improvements via firmware (not bug fixes) and wonder if Sony will also make an effort to improve their "flagships" by uncrippling A-mode, adding chroma noise reduction/CA correction to JPGs, etc. Not asking for the world, just a few things to extend the life of our investment.
I went through the same thing with the R1, except that camera had a real and problematic exposure bug that needed fixing. I waited two years... nothing. Then gradually realized Sony has walked away from me and will not even offer an upgrade path in the form of an R2.
So here we are again, 15 months since the A900 was announced and not a peep. Maybe it's too soon to conclude Sony is going to repeat their pattern, but I'm guessing they will.
Asking politely, crying, begging, won't help. Best thing is to research very carefully before buying Sony, and if you didn't and the camera is not meeting your needs, to sell and buy something that will. Expect nothing from this company, and you'll never be disappointed!