i never meant to suggest extreme magnification is necessary or even useful in honing a razor. Too much is just like chasing a compass, you get bogged down by the minutia & never get anywhere. It's just interesting that the guy took pictures of his razor in an sem after each hone. Pretty pictures that help illustrate how scratches and the apex are slowly refined at each stage. I know it's hardly definitive as we only get to see 0.01mm of one blade hone by one person on one set of hones.

That being said I do believe just like Euclid said that some higher magnifications can be useful as a learning tool or possibly as diagnostic tool but not for every day use, and certainly not 5000x.