With home key cursor you can still have JK as down/up keys. Inverted T for arrow keys could also be used as an alternative by the "very strong muscle memory fr

With home key cursor you can still have JK as down/up keys. Inverted T for arrow keys could also be used as an alternative by the "very strong muscle memory from games" crowd, that's a valid argument, but it's not some arbitrary arrows painted somewhere decades ago (the OP's keymap also uses inverted T in IJKL)