I heard about similar story from some old coworkers. I left the company because it always had a problem with good communication, devs being siloed, etc... A "p

I heard about similar story from some old coworkers. I left the company because it always had a problem with good communication, devs being siloed, etc... A "python dev" left the company. A different python dev was assigned to maintain his projects. They were surprised to find out all of ex-employee's "python" projects over the past 2 years were actually written in Rust. There was absolutely no code review in his department so no one was aware of this! No one else at the company knew Rust and they were debating rewriting it all, or hiring a Rust dev. My old coworkers were basically putting all the blame on that one guy. And sure, that's shitty and unprofessional of him. But how could someone write Rust for 2 years and no one else notices?? I didn't understand how they could blame the guy and also not feel supremely embarrassed for even getting into that situation.