Satoshi made a judgement at one time that 1 MB was an appropriate limit based on that vulnerability, considering the state of the technology, storage, propagation, etc.. What is the evidence for that vulnerability being sufficiently smaller now or in the near future that a 8x or 20x or 1000x is appropriate instead?
The evidence is the 3.5 billion market cap as compared to 0 back then (or the most optimistic estimate maybe 5M).
That's not evidence of anything.
For example, it could be evidence that the 1 MB block size limit is working great and shouldn't be changed.
I mean evidence based on analysis of the actual technology. Example: Someone on this thread or reddit (I don't remember which) claimed that laptop performance hadn't increased much in the past six years. Someone disputed that and pointed out that desktop performance had in fact increased by 2-3x. Now 2-3x is great but it isn't 8x or 20x, and that sort of data doesn't lend a lot of support for 1000x in 15 years either.