>Why do you need two instances of SSMS? The 2014 version can connect to 2012 servers.
>

I know but somehow I found it easier. May be because I am lazy to open a new connection and also I use Windows Authentication for both.

>Because SSMS is built on the Visual Studio shell, you could count that as three VS.
>
>How do you manage 40 tabs? Sounds as easy to use as populating a list box with thousands of rows.
>

Well, when I research something I often open a new tab and then it becomes another one in the list of tabs I have opened. Also, when I start the browser, I open it with last opened tabs (and all last opened instances). So, even if I am not reading a particular tab at the moment, I have it opened just in case.