Solving the transaction quality trilemma is imperative if we want free/negligible cost transactions without the bloat 

https://polynya.mirror.xyz/ibwxujFop29zEXhMWQrd_ujxKJvOYNQr8_hlYxk1GfE

Top 3 unsolved problems and under-researched areas in infra, IMHO: 

1) Transaction quality trilemma

...
2) Single-thread bottleneck (parallelize transactions on the same smart contract across multiple threads & machines/seqnrs) 
3) State hibernation (long-term sustainability)

Top 3 unsolved problems and under-researched areas in infra, IMHO: 

1) Transaction quality trilemma

...
2) Single-thread bottleneck (parallelize transactions on the same smart contract across multiple threads & machines/seqnrs) 
3) State hibernation (long-term sustainability) 

https://warpcast.com/polynya/0xcb430c27

I really like the idea of DAGs for eliminating bottlenecking. In principle, you should get the advantages of shards or L2s but in a way that's entirely transparent to users.

I'm not clear what the unsolved problems are with DAGs. I imagine that achieving transaction finality is a PITA.