[thesuitonym]

Chris Sawyer lived and breathed assembly, earlier in the article he states that he just felt more efficient writing it than higher level languages. Then you've got the modern team of devs who probably haven't worked with asm since university, and it becomes difficult for them to review the original source code. Also Chris probably wasn't doing a lot of the actual programming, so instead of one guy working on a passion project, you have a team of devs doing a job.