@Leon1 Cool! Sounds interesting! No, I have not. I became a bit fearful that I would be creating links out of words that occurred within existing links, or headings, etc… I also worried that other complexities would arise that I would not realize until it was too late.
There is another thread that explores this. I am not at all sure that this regex search and replace work. I have not tested or even inspected or really thought about it. I had totally forgotten to try it out until I just saw your question. Here’s a link, How can I multi-link large instances of a keyword all at once?
Obviously be very careful, and only test on a duplicate set of test notes. I’d be curious whether it works. On a related note, if you’re interested in understanding some of the regex in Obsidian, see this link: Regular Expressions in Obsidian (copied from mdn web docs)
Good luck!