Billions of people deal with slow web apps that collectively waste millions of years of people's lives so that the a few developers can save a few hours of work.
We could increase global white collar productivity by 10-20% almost immediately if developers would stop valuing their productivity over the productivity of their end users.
I have worked on quite a few Ruby web apps and built quite a few myself. Maybe 3% of the cases I encountered were about Ruby not being performant enough to do what I needed it to do. Where did the rest of the productivity of end users get lost?
Org dysfunction.
Note that those were web apps - so the user did not have to install the runtime, dependencies etc. to use the software. That is a whole other story (and not a very merry one, at least for all the scripting languages out there).
I find this funny because I'm sure you can find examples where users themselves demand things that are overall less efficient. But, you're not wrong, there are efficiency gains to unlock on both sides.