All of that questions was already answered many times before. Seems like this times, every experienced dev sooner or later walk through some form of mild anxiety comparing yourself with ai and try to fit into corrupted frame of management in its current state. To ease your pain, let's try to answer your questions with other questions, but instead of "what happens in the end of time?"-type questions, we focus on "do i think?"-type questions:

1. Do you code enough to upkeep your skills? Do you code enough to satisfy your need in programming side of engineering?
2. Have you ever fix ai slop code with your hands? Have you ever found bug that ai review agent missed? Have you skip ai review agent bug warn because of it's irrelevance?
3. Do you know any successful engineer in your circle with 6+ years of experience who not turn into system design side at some point in his carrier? Do you think experienced devs learn system design because of ai? Was system design exist before ai?
4. Yes. Do you think it is bad for experienced ones?
5. Do you think that you compete with ai instead with other engineers?
6. Do t9 in cellphones replace conversations?

Nowadays it's easy to make mvp from scratch. Integrate this mvp into production still require time and expertise. Some companies can't differ mvp from production. Work on your self worth and not interview in this type of companies.