It really depends on how the system is deployed. For a web service, the cost might be almost identical, except reputation damage, which is impossible to proper

It really depends on how the system is deployed. For a web service, the cost might be almost identical, except reputation damage, which is impossible to properly quantify. For a game, where almost everyone plays it on launch, if it has too many bugs, the product might be sunk, or it might be a rolling update with minor extra cost of compatibility. For embedded firmware... Well... You might never really get it fixed, as not everyone will upgrade. For mission critical software, it can literally kill people or destroy hardware, or cause huge costs.