I've switched to vim and dvorak simultaneously, feels natural. Browser shortcuts was a bit of a pain, never adopted new places for Ctrl+C, Ctrl+V — use Ctrl+Insert, Shift+Insert — not much of a problem with X PRIMARY selection.

No one is going to type on my setup so I've also switched Ctrl and Alt

    $ cat .Xmodmap 
    clear control
    clear mod1
    keycode 37 = Alt_L Meta_L
    keycode 105 = Alt_R Meta_R
    keycode 64 = Control_L
    keycode 108 = Control_R
    add control = Control_L Control_R
    add mod1 = Alt_L Meta_L

    $ cat .xinitrc
    xmodmap .Xmodmap
    setxkbmap dvorak,ru -option grp:caps_toggle
    ...

(and mapped Caps Lock to switch languages)

I didn't .. and yeah the OP is right about the jhkl keys getting broken up, but I don't use them as much to move around as either wordwise movement or line wise movements in vim. I don't have to more than say 3/4 character wise movements. But then I'm a pythonista, and not a regular programmer role anyways.(more closer to data science /BA roles)... So yeah, that plays a part ..