[akhmatova]

There are and never will be (meaningful) statistics for the "N percent of bugs are caused by X" question.

Every org's use cases are different, how do you get (let alone compare) data frm different orgs, who really counts their bugs anyway (and those that do at scale and in detail are probably doing suffering from some form of myopic management disorder or another), etc.

All you can do is ask people their gut take based on their particular experience. For systems engineers, a lot of bugs are due to memory safety. For more consumer-oriented startups (or in most any bigcorp), yeah, it's "business logic" (or people's inability / unwillingness to communicate), etc.

"We found that 70 percent of our bugs could have been prevented by moving to TypeScript", yeah sure.