Just watched this. I’m new to this whole concept and will follow though with most of the suggested videos.
My take on this. i.574.
Nothing was mentioned of calligraphy and does a (.) period really mean what is suggested? I doubt it. A better case study of why a dot and comma started being used and when did they fall out of usage really needs to be considered.
Also, this is clearly Euro-centric information. China and Japan have their own naming conventions. Right now in Japan, it’s Heisei 30. I was born in Shōwa. Both countries also have decent records and checking against the gegorian calendar is easy enough.
There might be something here but just adding or deleting massive amounts of years, just seems a bit off.