Is it possible to forget some things in EMS? Sure.
But if you have spent the time and put in true effort. You can’t unlearn what you have built.
Now there may be times you have to refresh your memory or maybe you realize you have not mastered a subject in a way that you are confident.
But unlearn it? No.
Remember that if you give the effort, make the sacrifice and put in the work. You will always have the skills and knowledge you’ve built.
No one can ever take that away.