I use LLM's a lot.
They are hugely useful.
I don't think that they will replace humans in everything. They are productivity multipliers.
Past new technology eliminated some jobs, such as autolooms that put some loom operators out of work, or PC's that put punch-card operators and some secretaries and typists out of work. Also, past new technology created more jobs in total, such as autolooms that created more jobs in total in the textile industry, or PC's that created jobs in computer tech, computer sales, programming, and use of computers. I think LLM's will be the same.