This is because the US does not require this, and the US arguably lead the charge in internet innovation, standards, and commercialization and continues to be t

This is because the US does not require this, and the US arguably lead the charge in internet innovation, standards, and commercialization and continues to be the highest paying country for SWE roles. Thus, most discussion is US focused. In other countries like Canada, the title is just s/Engineer/Developer. To add, the author is talking about the levels no longer indicating experience due to level inflation. Not word semantics along the lines of “senior no longer means the oldest on their team”.