Re: Not just on Windows
I'm not denying your experience but just to put another point of view. Since getting the Lollipop OTA for my Nexus 4 the whole interface is way quicker. The new Gmail loads a lot quick and e-mails appear almost instantly, that's with 5 accounts including, a Exchange, Hotmail and Gmail.
Memory usage is also hardly any. I'm currently using about 500MB out of 2GB with about 15 apps running.
Overall since Lollipop I think the whole interface is far better, much easier to use, looks better and runs a lot faster with less resources.
As I said, this is just my use case, but so far it has breathed new life into my N4.