I’ve been using devenv for about 6 months now. I’ve started new projects with it and migrated old ones to use it as well. I’ve also set up my org’s repositories with it. Onboarding devs to projects is simple. All everyone needs on their local machine is git, nix, and devenv. Bonus points for using it with direnv for automatic shell activation when you enter a directory. Direnv allows for IDE integrations as well for project dependencies.