That video is almost certainly a parody. I've seen roasters make videos that poke fun at themselves for taking it all too seriously before. The floating math and the Doc from Back to the Future are a bit of a giveaway. With that I'm saying it's canned baked beans in those glasses

I guess that depends on what you currently have as your "best" grinder. In my case that's a 078, so I am in no rush. Option-O told me that I can order the 98mm burr carriers at a later time as well. From that perspective if I ever feel like needing 98mm burrs that option will be there