30B models aren't that good for now. They keep getting better. Qwen 3.8 27B is as good as the best available model from a year or two ago. Will 2028's 30B models be as good as the best available today? No idea, but I wouldn't dismiss the possibility.

I'd also wonder about what you can get done with a smart model running very slowly. You can run the biggest open weights models on relatively mundane hardware if you don't mind measuring your speed in seconds per token. That's going to be untenable for interactive use, but might be fine for "go hack this thing for me" if you're patient.