If all else is equal, faster is better. But there's tons of examples of slow software that is more functional and/or easier to use winning over faster software

If all else is equal, faster is better. But there's tons of examples of slow software that is more functional and/or easier to use winning over faster software. Look at things like Ruby and especially Rails, Python, any JetBrains product, Java (fast now but back in the day quite slow), webapps in general, probably your favourite DE, etc... Life is short, optimizing everything takes time and most people don't care as long as something is usable.