I've been taking 2mg of Xanax every night for about ten years with continued success. Is this ok?

What specialty is your doctor and what State do you live in? In my State it is extremely difficult to get even small quantities of benzodiazepines. Count your blessings and hope that your doctor doesn't die from COVID or retire. I've gotten klonopin for over 10 years only because I had a stroke which caused myoclonus. But for anxiety, restless leg syndrome or to sleep, only a few pills a month for the restless leg syndrome. A couple of my friends used to get it, but then their doctor retired or left the State and then they can't get anyone to prescribe it.
If you lose your doctor, try to give it as much time as possible to wean off of it, because it is likely to be hell.
Good luck.

I would say if it has worked for that many years and your doctor has prescribed the medicine for that long - then go for it. I am still trying to find a med for my anxiety and insomnia. Seems everything I try makes me sick.