I have a hard time believing this for most software roles (which is just basic web development, scaling issues aside).

I can easily envision myself working part time on a react application or creating a spring app. Not exactly ground breaking stuff here.

Programming is the easy part. It’s the collaboration and communication that get you. Working part time means a higher ratio of your time is spent communicating and syncing up rather than doing “actual work”.

This also may suffer from an explosion of Brook's Law. So, now you're working less on "actual work" which means that for the organization to get similar amounts of stuff done, they need to hire more people... which means that a larger portion of the time is spent communicating and syncing up.

This is every large company I've worked at in the last 5 years.

Brooks' law has exponentially increased the amount of syncing required and the explosion of open source and SaaSes has shrunk the amount of coding required.

The problem is in 10 years when no one uses react or spring. Like my friends that know Visual Basic.