I used to hear debates over whether proprietary software or open source was higher quality, but I haven't in some time now.
Perhaps it's because virtually all software stacks are partly open source now?
miniblog.
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The Carbon language has a notion of a 'painter', a designated person to handle design debates that are just bikeshedding ("choosing the colour").
Less dramatic than a BDFL, and a cute name.
https://github.com/carbon-language/carbon-lang/blob/trunk/docs/project/evolution.md#painter
One weakness of online discussion is protracted debates or arguments. What if commenting systems only allowed one comment per user?
(Assuming a robust mechanism to prevent duplicate accounts.)
There's a roleplay/simulation/model Houses of Parliament on Reddit, complete with debates and speakers! Incredible.