Apple has targeted iPadOS to casual computer users who mainly consume content and require light content generation and editing capabilities, and as it turns out there's a HUGE market for that. But it's not for me. I'm a developer by profession and my hobbies are music and photography. All of these push the limits of what iPadOS is capable of delivering - but MacOS delivers with aplomb.
And now thanks to Catalyst if there's some must-have iPadOS app I want to run then I can run it. The MacBook Air may be the most versatile machine Apple has ever made for users like me.