[csdvrx]

Initially, this was my "alternative" setup when I couldn't have Caps lock mapped to both Esc+Control and only doing control, but I've found it easier than using Control-[ for Esc (I never got into this habit) and more reliable that betting wherever I expect Esc to be on the keyboard is where Esc will actually be, or that I'll be on a system with Caps properly remapped.

I need to reliably enter/leave edit mode way more than I need to insert tabs, but I can still insert tabs when needed with Ctrl-q Tab

When do you need to insert tabs in vim?

Personally, I rarely need to insert raw tabs: the only exception may be Makefiles (and for that I have a configuration)