How can we prepare for such a future? And secondly, the most important thing in software is not the actual writing of code, but making sure that it solves the business problems, makes the right trade offs, is maintainable, testable and bug free. 90% of the time is not being spent writing code.

Yes. LLM can write some pieces of code. Yes, software can write some code. But can it maintain a million line codebase, can it prioritize issues, can it commit to timelines, can it talk to other people to resolve the ambiguities, can it make the trade offs, can it push to production, can it debug in production?

None of this actually involves writing code. At best, LLMs can take out interns and SDE1s but not more than that (think aechitects, staff plus roles)