I haven't tested them on many things. But in the past 3 weeks I tried to vibe code a little bit VHDL. On the one hand it was a fun journey, I could experiment a lot and just iterated fast. But if I was someone who had no idea about hardware design, then this trash would've guided me the wrong way in numerous situations. I can't even count how many times it has built me latches instead of clocked registers (latches bad, if you don't know about it) and that's just one thing. Yes I know there ain't much out there (compared to python and javascript) about HDLs, even less regarding VHDL. But damn, no no no. Not for learning. never. If you know what you're doing and you have some fundamental knowledge about the topic, then it might help to get further, but not for the absolute essentials, that will backfire hard.