The thing is, old incomplete games like that usually sold terribly. They are now either forgotten or worse: remembered for being terrible. Stuff like Superman64.

There used to be more pressure on developers to make good games first. Testing and QA departments have shrunk, or st the very least failed to scale with the increased scope of modern games. They instead rely on consumers to report the bugs.

So at the same time they keep raising prices, they are also pushing more of the work onto the consumers.