If you're a tech leader and confuse Linux boxes for mainframes then I don't think it's hindsight that makes you look foolish. It's that you do not, in fact, understand what you're talking about or how to talk about it - which is your job as a tech leader.
If you're a tech leader and confuse Linux boxes for mainframes then I don't think it's hindsight that makes you look foolish. It's that you do not, in fact, understand what you're talking about or how to talk about it - which is your job as a tech leader.