0.999... is categorically not an asymptote. Asymtotes apply to graphs of functions, not numbers.
0.999... is a fixed value, it's not a function.
This is not really up for debate; it's a fact of mathematics, as any competent mathematician will tell you. Of course I'm not going to change sides; I'm aware of the facts. You should change sides because you clearly don't understand what you are talking about. Don't let ignorance of something cloud your thinking; it's fine to accept something as true without fully understanding why it is. I accept a load of parts of physics as true without understanding them, because ultimately physicists study this thing for a living and presumably know what they are talking about.
0.999... is a fixed value, it's not a function.
This is not really up for debate; it's a fact of mathematics, as any competent mathematician will tell you. Of course I'm not going to change sides; I'm aware of the facts. You should change sides because you clearly don't understand what you are talking about. Don't let ignorance of something cloud your thinking; it's fine to accept something as true without fully understanding why it is. I accept a load of parts of physics as true without understanding them, because ultimately physicists study this thing for a living and presumably know what they are talking about.