Some years ago, I made an application that scrapes a website daily, and presents the current and historic information to the user.
I wrote a bit about it in a blog post, albeit skipping many of the technical details there. I've barely done anything to neither the frontend, bff or backend in years. I probably should, but you know, time, energy and all of that.
To be fair, I've rewritten the frontend from Vue to React, motivated mainly by the fact that I'm now using React at work, and no longer touch Vue that much.
On the backend side, though, it is still the same Quarkus application, powered by Jakarta EE, running serverless, and it's still fast enough that neither me nor any user complains.
I'm using it myself regularly. Other people use it as well. The only thing I do is pay a couple of cents a month to the cloud provider.
I know that I ideally should have updated the dependencies and maybe my code as well. I might do that one day. Until then, it keeps giving value to the users. That is pretty cool.