The cost plays a very important role in building codes, a lot of changes are either not made at all (because they will be prohibitely expensive), or spread out over many years.
Plus, the bulding codes are safety-focused and often don't cover things that most people would consider defects: for example a huge hole in the interior wall is OK (unless it breaks fire or energy efficiency codes)
Plus, the bulding codes are safety-focused and often don't cover things that most people would consider defects: for example a huge hole in the interior wall is OK (unless it breaks fire or energy efficiency codes)