That genres have space for multiple major titles.
Lets take the obvious one, MMOs. Right now people like to compare Classic VS Retail VS FFXIV. Claim one will/is killing another, and celebrating it.
The industry/genre is big enough for all of them to thrive, and if you are actively celebrating one killing the other, you are blight on the industry. People should be encouraging competition and choice, but there are so many people who thrive on telling people why Classic is killing Retail or FFXIV is killing WOW etc. If you think that, fine, but if you felt that your literal brainfart warranted enough to go onto a post and actually type out a novel telling someone their choice of game is wrong, you are an idiot and you are not meaningfully contributing to anything.