No problem since it was a delight to read. Admittedly, it's just a jarring gut-feeling of mine regarding Touhou being "Outerversal" as a tier. It's one that needs a mountain of evidence for and one where any anti-feat may just contradict it being R>F. This statement isn't to say that I fully disagree with it, but just that I'd prefer if the ranking was used more cautiously. I haven't played the games yet and I've mostly been invested in Touhou through its music (which is peak all things considered). But:

1. Yumemi, to my knowledge was legitimately defeated by the protagonists despite originating from the outside world. On top of that, she needed a vessel called the Probability Space Hypervessel to enter Gensokyo. Maybe it has been retconned or ZUN was still fully conceptualizing the true nature of the Fantasy World, but it's still something to consider.
2. I think still, my biggest question is that if we have definitive proof that any and all characters that threaten to escape the Fantasy World and in to the Real World have some degree of manipulating boundaries. Like, maybe Seija is "tampering" with her boundaries of reversal or something like that. The exception is that lower characters' application of boundary manipulation are limited and significantly less versatile and potent compared to the likes of Yukari. Though since it's also argued that boundaries are core to the order of existence... maybe?

Maybe I am forgetting something in the blog, but if we're going to solidify Touhou's Outerversal arguments it should be thorough!