I would get a new board to me I want my board to have the shape I bought it in, I'm sure u can still skate it but now its like your just waiting for it to snap, u don't wanna be just getting to skatepark or spot and it snaps first trick, go grab a 30 dollar deck from zumiez and keep this one as a back up deck or if a homie needs a board
Whenever you feel like you need a new one and you have the money don't rush it though just because it's old. Unless it's snapped and you don't have anything else to ride just look around and take your time until you find the perfect one
I would say if you're able to ride it and/or do your tricks with no problem keep on using it till it actually snaps or u just can't ride it anymore.
If it works for you enough to use it then i would keep it until it gets almost unusable...but if it is really a bother than sure why not.
Whenever you feel like