What happened to Boba Guys?

So, let me get this straight. Boba Guys, the popular bubble tea chain, seems to have vanished from the scene. Is this a temporary hiatus, or have they permanently closed their doors? What led to this change in their fortunes? Did they struggle with financial difficulties, or was it a matter of changing consumer preferences? And if they're gone for good, what will be the impact on the bubble tea industry and their loyal customers?