Great overview of Pyston, covering motivations, design and performance: https://www.slideshare.net/mobile/KevinModzelewski/pyston-talk-111015 (also contrasts with Pypy)
miniblog.
Related Posts
The motivations of YouCompleteMe, emphasising a design that requires the user to press no buttons to see completions:
Finding meaning in open source projects, the principle of charity, and avoiding a mindset of scarcity.
Really great reflections on the motivations of open sourcing Rails.
https://world.hey.com/dhh/i-won-t-let-you-pay-me-for-my-open-source-d7cf4568
Excellent article on level design in games to encourage player exploration, and considering the movement motivations: