More generally the entire move from words to pictograms looks to me like a regression to a technology that was superseded by a superior one 5000 years ago.
Now, I just rely on Firefox’ autocompletion of the URL bar, or I just use Thunderbird instead of GMail, or here.com maps instead of Google maps.
I expect it to be in the drop down on the left, since Gmail and Google Calendar are otherwise so well integrate, but nope, it is hidden in the little square.
The first couple times I had to actually Google how to access my calendar from within Gmail (I can always go to calendar.google.com of course)
Even today, years afterwards, I was on the phone checking my calendar and I totally lost the train of the conversation as I was hunting in that dumbass thing for the calendar.
The worst part is that, yes, the top was getting stuffed, but instead of letting you choose what you wanted in your menu, they added that navigation monstrosity instead.
And can't you customize that menu? Just make it work for you.
Now I just don't go to YouTube when something on Gmail piques my interest.
That one click was a huge amount of effort for casual browsing, and forces a re-evaluation of idle browsing between properties.