One issue is turnover, it's annoying to spend time training someone who you won't be working with a long time. I've only had that really happen once. So a tip

One issue is turnover, it's annoying to spend time training someone who you won't be working with a long time. I've only had that really happen once. So a tip for junior's might be to look at places where folks have a bit of tenure and stick around (I know some places cycle folks between teams like crazy - that makes this hard).