Comment by knowitnone

You must be referring only to security bugs because you would quickly toss Excel or Photoshop if it were filled with performance and other bugs. Security bugs are a different story because users don't feel the consequences of the problem until they get hacked and even then, they don't know how they got hacked. There are no incentives for developers to actually care.

Developers do care about performance up to a point. If the software looks to be running fine on a majority of computers why continue to spend resources to optimize further? Principle of diminishing returns.