Were semicolons in subheadings common before AI? This subheading of the TomsHardware article just seems very artificial:
> The fingerprint only switched the USB connection on; nothing on the card was encrypted.
> The fingerprint only switched the USB connection on; nothing on the card was encrypted.
I guess it comes down to expectations? You don't expect formal conventions from a website writer, while I absolutely do.
I find it interesting that it was a flag for AI writing for you. That's going to make me consider my voice in certain situations now.