I don't see how part-time developers will ever work.
As a developer we are not paid for the time in a chair.
We're paid to have the "code base, and all the business context" in our brain.
Then solve problems.
If you're a part time developer, what you're not doing is devoting less time to output.
What you're doing is devoting less time to meetings and knowing the codebase.
Aka input.
And everyone knows, the better you know a codebase, your productivity is logarithmic. As your mental model of your problems improve linearly, your productivity grows exponentially.
I mean, there's quite a lot of famous employers that pay you a lot of money to work more than 40 hours a week no?
But also, the nature of education etc means that a mediocre developer who works 70 hours a week, will probably be less effective than a brilliant savant working 20 hours.
Usually, instead of paying the mediocre developer to work 80 hours a week, it's cheaper to pay a better developer double, to work 40 hours.
As a developer we are not paid for the time in a chair.
We're paid to have the "code base, and all the business context" in our brain.
Then solve problems.
If you're a part time developer, what you're not doing is devoting less time to output.
What you're doing is devoting less time to meetings and knowing the codebase.
Aka input.
And everyone knows, the better you know a codebase, your productivity is logarithmic. As your mental model of your problems improve linearly, your productivity grows exponentially.