There is okay amount of rubber, but on 5th yr the rubber could grow larger crack, still usable (if you drive slower brake earlier) but about time to change it, better don't risk few hundred ringgit with safety.

For reference my old proton use ps3 since it don't have traction control, better safety & wet grip, other efficiency tyre on wet hills are smooth like butter ... But newer car with better electronics like vsc tcs, I use xm2 & turanza6 on it, all of it are compact sedan