I hope that NEVER happens
That's actually M$ Visual Studio style, and I personally don't like how it feels. As mentioned, Lazarus as of 0.9.30 has a nice docking feature which enables you to dock every window so you can join them all together in one. Except (thankfully) the Form Editor, and of course the component pallete (thankfully again) stays where it is.
The docking feature is still quite moody, but with some effort I've managed to group windows either in D7 or D2005 style...
When Delphi appeared as VBKiller, we think it is a greate product and even the SDI forms seems a much more advanced design than MS VS.
Of course at that time we did not ask how to design a larger form on a smaller screen and we thought the IDE form should be placed anywhere we want.
After Delphi 7, the IDE changed. Did Borland abandon a higher tchnology?
No.
1. Put the component pallete to right, because the widescreen is popular so we need not waste vertical resource.
2. IDE message form titlebar is of course waste.
3. Did we alway place the IDE forms before? No.
4. Docking is a good design.