My personal definition of a senior engineer is "a person who noticed that they already forgot some things they used to know by heart". You can't know everythin

My personal definition of a senior engineer is "a person who noticed that they already forgot some things they used to know by heart". You can't know everything and you can't keep up with this firehose of new knowledge that is published every day. Most of that is not relevant to your field anyway - whatever it might be, so you don't actually have to know any of it. I mean, you're free to take it all in, but don't expect anyone to quiz you on it in a professional environment.