Is it even going to matter in the next 3-5 years? AI is going to make its own, kore efficient language and all the ones we use will be for hobby, fun and those who did not adapt.
I agree with you, but writing human readable code will become a cottage craft and hobby as while it is good to know, AI will just be so much faster and better that coding anything yourself will make little business sense. I am already writing way less code, especially with the 100k token windows over on Poe.com which seems to handle most of my script sizes.
This might handle scripts as you described, but just wait until it needs the context of random bits of a tens-of-millions-of-lines monorepo plus knowledge of custom infrastructure that isn't documented anywhere and--oh wait, we can't actually let this LLM-as-a-service read our code because X and Y compliance/security/legal/etc, even if we ran it on-prem.
The robots aren't coming for you so soon, don't worry.
I think you are right if the progress on AI is linear, but if it continues to be exponential, nothing you said, even undocumented is going to be a barrier. That assumes AGI is coming and is as smart as the smartest people. We will see, but my money is on the progress surprising everyone. I am surprised by how much AI has improved over the last 6 months alone.