I'd count in LLM coding agents favour: e.g. willingness and capability to do things which I'd have to go read a tutorial for; as well as rapidly being able to iterate and narrow down e.g. when given access to a repl.

Rhombus looks promising in terms of tooling.

On the other hand: LLMs are susceptible to incorrectly guessing "I think it should work this way".. I'd guess the powerful flexibility of metaprogramming could be more annoying than helpful. But, I'm curious.