Quadratic payments, surprised it has not been mentioned. Here is an old primer (old in DeFi space anyway) the space has moved in quite a lot of different directions since that was written.
this is not just another slight improvement to what exists. Rather, it’s an initial foray into a fundamentally new class of social technology which, has the potential to overturn how we make many public decisions, large and small.
On network updates and governance check out my posts starting here. The Safe Network will absolutely need a governance system for network upgrades and this is one of the smoothest examples out there. Prior experience has demonstrated that to not have a system like this in place will cost the core dev team many orders of magnitude more time in the long run as the greedy/malicious 1% exploit political flaws in the upgrade process to disrupt progress, because they can.