0 exists as a symbol. What it actually means depends on the context. With no context given I could just as easily argue that 0+1=2 where 0,1,2 are just symbols. Elaborating more, even taking 0+1=1 in the usual context, this context says nothing about improvement. It's a simple mathematical equation. In fact, improvement is not well defined in this case either.
Riince wrote:0 does exist, it's not an undefined value
also you should learn long streams because you learn very valuable skills like learning how to correct your finger movements during a stream and stamina