Thank you very much @lei for taking the time to write down your thoughts in so much detail, and I personally think there’s a lot of valuable feedback in there.
Some initial responses:
I expect more post mortems to be shared on those parts very soon.
Can you clarify this point? I am not aware that NNS nodes went offline during the SNS1 sale. (also minor detail, the NNS subnet is 40 nodes now).
I think this is not entirely accurate. For example for boundary nodes, this is being worked on, see Boundary Node Roadmap for the roadmap. The high replication subnet for eg defi is on our public roadmap and I expect it to be launched next week.
I will share this post more widely in dfinity so more people can comment on some of your other feedback.