“Everything is a double edged sword.”
That requires a positive side. What is the positive side?
“That requires a positive side. What is the positive side?”
I’m not sure if your comment is regarding double edged swords or the positive side of this new technology.
“Literally, a double-edged sword is a sword that has two sharpened edges. Figuratively, double-edged sword refers to something that has both good and bad consequences.
When you’re wielding a double-edged sword, you have to be careful that you don’t cut yourself when you’re trying to swing it at an opponent. Such a sword can be helpful (in striking your opponent) and harmful (if you strike yourself).
If something is a double-edged sword, it will help you or be good for you but will also most likely hurt you or have a harmful cost.
Example: My new car is a double-edged sword, getting me to work but costing me a lot of money in gas and insurance.”
https://www.dictionary.com/e/slang/double-edged-sword/
In the case of the article in question, the positive side is that someone unable to talk and is paralyzed could still express himself.