… a whole class of internet comments that can be summarised as “I disagree and that makes me ANGRY”. Which is a pity, because when two reasonable people disagree, there’s very often something interesting going on, just waiting to be discovered.
…”. You write your code naturally, then you measure it. If there are performance problems, fix them. We don’t need to prove an inline arrow function is fast, somebody else needs to prove it’s slow. Otherwise it’s a premature optimization.