That's a bold statement when majority of yuri last 3 volumes or less. The ones that get to double digits are the exceptions, not the norm.
My wording was bad sorry. I didn’t mean that the norm for Yuri is 300+ chapters like a battle shonen from the SJ. Some long run Yuri’s are focused on the development of a romance/couple (having a fantasy element -Murcielago, A monster wants to eat me and, I want to love you until you die- gives you more material to work on) and to extend the story authors tend to add drama or miscommunication and it often becomes tedious or repetitive. So my comparison is because mangas in the SJ extend past their prime and become monotonous and then when a series is shorter and concise is assumed to be canceled. Even though the average yuri has three volumes, if you read the comments, it is assumed axed if it ends in two or one volume. But I must add that even if Yuri Hime tends to go from one or four volumes maximum (with some exceptions) it’s easy to find long run Yuri in seinen magazines, Murcielago, Octave, Nameless asterism, Ohana holoholo, Vampeerz, and also, depending on what you consider yuri we have Rock is a Lady’s Modesty, Akebi’s Sailor Uniform, Dragon Maid, etc.
Likewise, my initial comment was not negative or with the intention to belitte that type of story, I am the type of reader who thinks “This is not for me anymore” and move on. I remember Citrus with affection. I like those kinds of self-indulgent stories, though I ocassionally wonder if its the author who wants to continue or is the magazine asking them to.