You know how you know you used to be able to do something but then when you tried to do it in the present, you couldn't but you remembered pretty clearly like it was just last few weeks and it feels like you could but in the end, it was not done,
It means you've changed and I feel so sorry because it was probably not intentionally otherwise you would have already forgotten about it.
Give it a try. It could benefit you.
The nostalgic feeling might kill you and you can't do anything to it because you suddenly lost your ability. Barney Stinson's rection when he suddenly lost his mojo on chasing women; *cue that*.
I think we've concluded changing unintentionally sucks.