The 100% MC/DC testing in SQLite does not force the code to be well-architected, but it does help us to improve the architecture. (1) The 100% branch test cove

The 100% MC/DC testing in SQLite does not force the code to be well-architected, but it does help us to improve the architecture. (1) The 100% branch test coverage requirement forces us to remove unreachable code, or else convert that code into assert() statements, thereby helping to remove cruft. (2) High test coverage gives us freedom to refactor the code aggressively without fear of breaking things. So, if your developers are passionate about long term maintainability, then having 100% MC/DC testing is a big big win. But if your developers are not interested in maintainability, then forcing a 100% MC/DC requirement on them does not help and could make things worse.