I used vim for about one year before switching to kakoune.
Using vim motions in Intellij or just vim hasn't been a problem for me at all. I don't use very advanced shortcuts (the most complicated motions I ever use are ciw and the likes). Even though they are quite different (ciw is <alt>iwc in kakoune) I adjust to them quite easily. Kakoune has also helped me get better at using vim because there is quite some overlaps that are more discoverable in kakoune (<alt>i summons a clippy that shows all the different objects you can select)
Using vim motions in Intellij or just vim hasn't been a problem for me at all. I don't use very advanced shortcuts (the most complicated motions I ever use are ciw and the likes). Even though they are quite different (ciw is <alt>iwc in kakoune) I adjust to them quite easily. Kakoune has also helped me get better at using vim because there is quite some overlaps that are more discoverable in kakoune (<alt>i summons a clippy that shows all the different objects you can select)