> Copyright covers implementations, not ideas.
Patents cover implementations, not ideas. Copyright covers "artistic works" like text (files), audio, and video.
To further clarify: The purpose of copyright is to grant control over who can copy it to the creator/owner so that it can't be reproduced or embellished/modified without their permission (which was a big problem at the time serious copyright laws started being written in the US). Exceptions such as fair use exist but that's the gist of it.
Profit was a secondary concern to control believe it or not. The fear being someone would publish a copy of your work with a few damning sentences changed or added here and there with your name attached. Ruining your reputation/career which was much more important to the controlling elite (land owners) at the time than the pittance one might make from sales of their writings/art.
The purpose of patents is disclosure. Don't let anyone state otherwise because the founding fathers were pretty damned clear about it. In exchange for disclosing your invention to the world you're granted a monopoly over who can use or manufacture it.
Patents never have and never will be about something as ambiguous as, "ideas".
Considering that software can only exist as ether it should never have been considered patent-eligible. Sure, you can implement software in an FPGA and claim, "it's hardware now!" Go ahead and patent that particular configuration of an FPGA... Which would be a tangible, physical thing. You should have no right whatsoever to claim a monopoly on the mere concept of such software which is exactly what software patents are.