For sponge cakes I weigh the eggs in their shells, then use the same weight for each of the other ingredients. How would you do this with carton eggs. How would you judge the amount of liquid for 1 egg. Useless for mayonaise and merangues. I'll stick to the really convenient single packaged kind straight from the hen.
OK, so there is the new "pampered Chef" must have gadget - a liquid egg weigher!!! Of course, if anyone releases one of these now i'll sue on copyright infringement grounds!!! :-)
In a way, i despair at this being sold in shops. It's like washed/chopped/diced/per packed veg being sold - is anyones life THAT busy they can't prep their own veg? But this is how the supermarkets "add value" and therefore cost and profits to a pretty basic product.
I see supermarkets are now able to sell "ugly" fruit and veg - i.e. the fruit and veg they previously rejected as it didn't conform to THEIR standards of "beauty" and they lobbied to have EU laws preventing the sale os this food - leading to wastage rates of 20-30% on farms.
Now this "ugly" stuff is on sale again, and i'm sure we'll see it packaged as "natural" or "organic" etc. but it might be offered as a budget range - with standard fruit and veg now being PREMIUM ranges
I guess the fact that less is being wasted by teh farmers is a good idea, and in the same way, if more eggs can be used instead of wasted from teh farms by selling them this way - then that's good too.
But i know that this will just lead to more hype and packaging and a way to squeeze more money out of the average punter.
still, it's not a development that'll change my world in any way at all. So i'll not lose too much sleep about it
(oh, and what if you want to make merangues? how do you separate the whites?

!!!!)