You were complaining about performance. If you, as in yourself the actual person, are not measuring things its just whining.

moment is a library discontinued years ago. They had a couple of commits in 2023 and a couple in 2022, but work stopped on the library almost 5 years ago. It is an abstraction over the big scary native Date object.

Up until 2 years ago I was writing JS full time for 15 years. I just saw a lot of people bitch and cry about inventing wheels and whining at performance targets they just guessed at. Its because most of these people could not write code. During this time there were some amazing things being written in JavaScript, and later TypeScript, but these awesome things were almost exclusively personal hobby projects the regular employed JS developer either bitched about or relied upon for career survival, because bitching and crying is what you do when you can't otherwise contribute in a meaningful way.