making something quick that kind of works is nice… but why even do so in the first place if it’s already out there, maybe maintained but at least tested?

In a sense, this is what LLMs are doing for you: regurgitating stuff that’s already out there. But… they are “bright” enough to remix the various bits into custom solutions. So there might already be a NWS API access app example, and a Waveshare display example, and so on, but there’s not a specific example that codes up a local weather display for the time period and parameters you want to see (like, temperature and precipitation every 15 minutes for the next 12 hours at a specific location) on the particular display you have. Oh, and would you rather build that in C++ instead of Python? Yeah, LLMs are actually pretty good at remixing little stuff like that into things you’re not going to find exact examples of ready to your spec.