I like the idea that we moved from cathedrals to megachurches because it explains why everything feels so corporate now. It is easy to forget that the messy bazaar is still underneath all the shiny tools we use.
There are still a lot of space for projects without much structure- if you have NSA codenames that aren’t public yet (and you are not subject to US laws) you can contribute with the nsaname tool and have cool names for your servers and containers. If you want to help adding glyphs to my 3278 font, you can. You can do that to millions of small projects that are small enough to not require much structure.