I think the 5% was a metaphor for how the org is barely able to utilize its resources.
Also wouldn't React JS/TS be an instance where you are fully utilizing resources? Not from a raw machine performance standpoint, but from a developer efficiency standpoint. Using nested for loops instead of a series of JS array functions is way more efficient but it is not even close to worth it. Machines are so powerful these days also that sacrificing readability/maintainability for performance doesn't really make sense to me.
Also wouldn't React JS/TS be an instance where you are fully utilizing resources? Not from a raw machine performance standpoint, but from a developer efficiency standpoint. Using nested for loops instead of a series of JS array functions is way more efficient but it is not even close to worth it. Machines are so powerful these days also that sacrificing readability/maintainability for performance doesn't really make sense to me.