I hope you track the progress so you're not surprised one day. The research side is way past embedded C and VHDL was of interest a year ago https://dl.acm.org/doi/10.1145/3670474.3685966 In embedded code, recent LLMs can do just fine with popular architectures. It's down to the spec and test harness whether embedded C works or not. The moat is not that big.