This.

I have started testing Copilot for fun, my wife needs a web-based project that is not maintained for a while now and written in PHP.

I asked Copilot (Agent mode) to translate it to rust just for the fun of it, seeing how far it would come - I expected nothing out of it. I broke down the tasks into manageable chunks, directed it in design choices, and asked it to use some specific frameworks.

So far it wrote 40k lines of rust on its own, and keeps track of what functionality is missing compared to the original project. It was impressive seeing it iterate alone for 30m+ at a time.

I'm no programmer, more systems/cloud engineer, so a rewrite like this would have likely costed me >2 years of work and still ending up useless for all intents and purposes. I'm pretty sure that the end result won't work at first try, and I'll need to fix stuff manually or direct Copilot to fix it, but after two weeks of 1-2h iterating at night, I have 90% of something that would have required someone full time for at least a couple years.

The two things I found most valuable (also in other things, like shorter bash and python scripts):

1. Syntax boilerplate: if your task is specific enough, it normally gets it right 99.99% of the time, and my brain can look at the actual logic rather than the commas, brackets and (in python's case) spaces

2. Documentation: I spend 95% less time looking at documentation for something, I don't need to comb the entire language/package/class for the specific things, it normally gets it right, and worst case I can ask it to do a refactor with the most modern standards for specific library version X