https://blog.chrislewis.au/the-long-tail-of-llm-assisted-dec... same author wrote about their process

Useful, but complements existing tooling & falls short on the hard part

I work on Ship of Harkinian. We're sering more vibed libultraship ports. Yet to see a real success

Massively, armed with the right tools you can tear apart old software now

Significantly. It also has sped up the ability to do recompilations, too.