That the current thinking and evidence on abiogenesis says that this all happened very very early in the earths history would lead me to believe that abiogenesi

That the current thinking and evidence on abiogenesis says that this all happened very very early in the earths history would lead me to believe that abiogenesis is probably quite common. The existence of only DNA based life forms, given we now have good evidence that other chemical elements could have become the bases of dna (as opted to g c t and a) would also tend to indicate that it was probably just the 'winner' of that early evolutionary arms race, i.e. What chemical formula can reproduce the fastest under those early conditions