You barely need domain expertise any more. Just ask claude to make it go faster and it will.
This.
As I’ve pointed out in other posts, I work in two languages: Swift (my main language), for native app clients, and PHP, for backend work.
I have a lot of experience, with each language (12 years for Swift, and 25, for PHP).
My experience with an LLM, is that I get very good PHP, and fairly mediocre Swift. The Swift often looks like fancy tricks, that newer enthusiasts like to demonstrate. Lots of unnecessary threading, and complex, dogmatic, overengineered approaches to simple problems.
I suspect that this has a great deal to do with the availability of high-Quality public repositories. PHP is more than twice as old as Swift, and, by nature, is a much more open language.
I think most of us have seen incredibly creaky codebases that are too buggy to be maintained any longer, where we make the hard choice to wipe the slate clean and build a new one.
We might find those rewrites happening every 12-24 months instead of after a decade.
[1] Frontend people, I mean no disrespect -- just that React & friends are (ab)used for nearly every website now, even those which map perfectly onto the "Simple document viewing with occasional submission of incredibly simple form data" model that plain HTML has always been perfect for.