That seems to me to be akin to saying that you would like everyone to use Windows? Or less insultingly, only a single distro of Linux:-). Indeed, not everything needs to be a competition, but if someone wants to write code and make a better thing, and then turn around and allow everyone else to use it for free, then I for one am all for that!

But I do see your point, e.g. in how there are all these apps, making it confusing how people will view content when they differ in even fundamental things like how images are displayed or markdown syntax. It seems just the nature of the world, even FOSS where new features could theoretically be applied to all apps, if only people weren't as lazy, as to e.g. not integrate the new freely offered feature, or to continue to use an app long after it ceases to be updated routinely by its cohort of devs.