Luckely there are tools like Lighthouse[0] but with all the abstractions and frameworks inbetween it is often impossible to introduce the required changes without messing up the quality or complexity of the code/deployment.
We're not quite there, since web pages are generally more than one screen, but we're getting close. Motivated searchers could probably find a concrete example of such a page somewhere.
No, you can not add the whole c++ std lib into our code. Yes, I know it is useful. Yes, that will save you 2 hours of work. However, the code no longer even fits into the 1MB of flash we have. Yes we can ask for a new design the management would love to spend 500k on spinning a new design and getting all of the paperwork for it done, and our customers would love replacing everything they have for functionally equivalent hardware that now costs 50 dollars more each. But at least you saved 2 hours writing some code.
Management should seriously consider whether the 0.01c saved on that 8Mb chip is worth the design overhead from very tight constraints. There is most likely a pin-compatible 16Mb chip that would eliminate all the pain.
Yes, I know that in high volumes every fraction of a penny counts. But if you frequently find yourself engineering your way out of trivial constraints, you might be doing it wrong.
Then the candidate is selected and goes to work where the selection bias fades into expectations of conformity onto a bell curve. The people who conform to the middle of the curve are generally the ideal employees. The people at the low end of the curve are either released or retained as padding against future layoffs. The people at the high end of the bell curve are an anomaly. Those people are far more productive but are willing to use less popular conventions to achieve superior results which tends to result in friction.