You will encounter a lot of people who look disfavorably upon Flatpaks in this thread, myself included. However, I think it would be disingenuous not to point that that a significant portion of Linux users, if not the majority, like them, and many think they are the future of application distribution. The reason why you are only encountering the former here is due to the culture of Manjaro: it attracts the kinds of users who also happen to dislike Flatpak.