Shoulders of Giants - what are the best qualities of other cryptocoin ecosystems?

One of the biggest benefits of Cardano being a newer entrant to the market is the hindsight it enjoys - being able to look at the state of the market and employ some of the best strategies in both tech and community building. Many of you now have experience in other projects, and it might be good to summarize the good / bad of what choices that community has made.

To anyone who has been active in other crypto communities, what do you think works and you’d like to see here, or what doesn’t work and you’d like to see avoided?