That depends on the goals of the prompts you use with the LLM:

* as a glorified natural language processor (like I have done), you'll probably be fine, maybe

* as someone to communicate with, you'll also probably be fine

* as a *very* basic prompt-follower? Like, natural language processing-level of prompt "find me the important words", etc. Probably fine, or close enough.

* as a robust prompt system with complicated logic each prompt? Yes, it will begin to fail catastrophically, especially if you're wanting to be repeatable.

I'm not sure that the general public is that interested in perfectly repeatable work, though. I think they're looking for consistent and improving work.