https://ask.com/ is my go-to site that I know will be up, but I know will not be in my DNS or browser cache. I use it as my "wait, is my internet really working" check.
I hope the domain lives on, and that I don't want to visit it.
I once implemented my blog as pure RSS, but also a website that could render arbitrary RSS feeds as a normal looking blog. (Passing the RSS feed via query parameter).
The nice part was that the bit that was mine was just a single static file.
If you're genuinely confused, and haven't tried Opus for coding, then it's not surprising you're confused!
It is also okay for you to just not like the idea of LLMs for coding (but say that!).