I agree, there are countless issues and challenges (and ideas, designs etc. how to tackle them). The most fundamental is for mainstream, non-technical people to realize that "social media" is not rocket science invented by Zuck, its infrastructure. Every bit as vital (actually more) as the roads and parks and water utilities of a city.

There will be some happy surprises required to overcome the inertia of network effects but enshittification is now terminal, so it actually looks promising :-)