I agree with this. Whatever computing effort is needed to display how many items are in my cart, is surely not required when I am just sitting here answering forum questions?
Most of the other sites I have visited (for example, Adafruit) separate out the shopping experience from the support experience.
Usually you either want to shop (in which case you aren't currently interested in the forum) or you want help with something you received (in which case you aren't currently interested in the shop).
I know a lot of sites are going for this unified "we'll help you spend more money easily" approach, but surely we can manage without it here? Just as an example, iTunes, which I complained about in a recent thread, is now a 1/4 of a gigabyte download. And iTunes no longer is just a program to play music you own, but much more a method of getting you to spend more money. "Hey, here's another song you might like!".
I've noticed another odd thing, since the upgrade. Sometimes changing tabs in my browser involves a lengthy delay (say, a second or so). Normally clicking on a tab in the browser is instantaneous, but now -- for some reason -- it isn't. Is it saving my shopping cart or something? It just makes the interaction between me and the web browser sluggish, when it didn't use to be that way.
Now I know you probably won't believe me, so I made a screen recording.
Notice how the contents of the tab takes a good couple of seconds
to update, after clicking on the tab. By comparison, switching tabs in the Adafruit page is instantaneous.