The 1-7 list you mention definitely deserves it’s own blogpost and how to implement these. I’m currently not using any of these except 1, and probably don’t need the rest for a while but I do want to know what I should do when I need it. For example: what and how should things be cached? When and how to denormalize, why is it needed? Why append-only and how? Never ‘sharded’ before, no idea how that works. Heard some things of everything async/in the background, but how would that work practically?