My dream editor would feature: * Three modes: insert, quick commands, a searchable palette for everything. * Configurable switch between modal/non-modal use of the command key. * On screen display for quick command mode (e.g. a partially translucent display of the keyboard when command mode is entered with icons to show what each key does).
The memorability issue for key-strokes doesn't really exist in a modern desktop environment. It is a relic of terminals with low bandwidth and poor support for multiplexing information. In a windowed / eye-candied environment the memorability of shortcuts should be a non-issue and discoverability of the command-set should be improved.
At this point I have to accept that I've said way too much in response to your nitpick and I will stop typing now :)
This one is also provided in Spacemacs which is called editing style (vim, emacs or hybrid). It is possible to switch between them dynamically.
I work on different keyboards, actually 3 different layouts: external keyboard home and at work, home laptop, and work laptop (different one).
I think it would be difficult to do the emacs chords on different layouts. For basic vim usage I just need to adapt to 2 special keys - colon and slash (+ right shift). That takes just few minutes.