Aside from abusive/toxic workers, do you think some diversity (not necessarily racial but cultural as well, different age groups,etc) would do any harm? I pers

Aside from abusive/toxic workers, do you think some diversity (not necessarily racial but cultural as well, different age groups,etc) would do any harm? I personally enjoy working alongside older folks who I find invaluable, they have been around for a long time and have lots of stories to share, but are not as quick to jump on a new technology bandwagon. Lots of companies seem to want to keep the young vibe and avoid hiring these folks.