How long must a language be around and prove it’s staying power before people will stop brushing it aside with the “$safe-language-trend-of-the-day“ quip? 1 yea

How long must a language be around and prove it’s staying power before people will stop brushing it aside with the “$safe-language-trend-of-the-day“ quip? 1 year? 2 years? 5 years? 50? How many people must use it? 1k? 10k? 100k? It’s pointless to argue with someone who throws Rust into that category at this point because it means nothing. It’s a slight to allow them to feel ok, that eventually this language too will pass, and so it will be ignored.