Oh yeah, one of the things I remember now regarding smaller blocks was bandwidth more than processor being an issue. There's a name (similar to how we have Moore's Law for processing) for a similar thing on transmission speed trajectory, and it's far slower a growth than Moore's Law (which is obviously not even a real law of nature itself). I remember that tidbit also being quite convincing. No need to reply, just wanted to get that off my chest.

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Nielsen's law. Which also is holding up quite well. x200 since the introduction of the 1M "safety" limit. Average household bandwidth in 2010: 5.4 Mbit/s Average projected household bandwidth for 2026: 1 Gbit/s (which equals 1000 Mbit/s)
Knowing that the 1M limit was first reached in 2017, we could assume that 20-40M blocks would be just fine for today's bandwidth infrastructure. BCH has 32M and from there a dynamic growth algo, but is still utilised under 1M and never has been attacked in the way feared by Hal (and Satoshi).