Management is a different job
Many argue the real problem is that engineering and management need different skills, yet hierarchy and pay push good engineers into management; separate IC and management tracks are proposed.
Peter Principle is too simplistic
Several say competence isn't one-dimensional, people learn and grow, and promotion depends more on politics than ability; others reply the principle already accounts for different skillsets.
Imposter syndrome passage baffled readers
Commenters puzzled over or rejected the article's claim that 'imposter phenomenon' was medicalized to hide real imposters, though some agreed the real imposter is often the boss.