>>3000670He's not talking about himself specifically. People like labels, groups, and branding. If you divide them up, a lot more people are likely to get into them by groups. Niji is broken into groups too, but it's not focused upon/put into the EN wiki beyond what year they debuted.
On the flip side, you do get people loving one group and hating the rest, but that's not a major problem for Holo yet since JP barely has 25 or so people. Even then you still have schizos going around spamming "gen 3 is the best and the rest suck", or even people comparing JP to EN.