Not picking on you specifically, just curious: the first time you [thought you] heard "this is a great Segway into the next topic", didn't it sound strange or unusual to you? Weren't you curious enough to google it, which would have led to the correct version?

I think this is what gets me when people use "Segway" or "per say". It suggests a certain lack of curiosity, an attitude of "I have no idea what this means, it doesn't make sense, but I'm going to use it confidently anyway". It also suggests that the speaker doesn't read serious works (otherwise they wouldn't use the mangled spellings).

(As an aside: I recently read something about "wearing a Guy Fox mask". Took me a second to get it, and it was almost physically painful when I did)

“For all intensive purposes” is another one that doesn’t pass mustard for me.

Wow. What a doggy dog world language has become.

"Segway" also makes perfect sense. "Let me use this as an awkward clumsy vehicle to get to the next topic".

Segway and segue are close to homophones or homophones depending on the speaker, it's kind of the point

Well, yes, that's part of my point. You know "Segway" but not "segue". Speaker says "segue", because they're close homophones and you don't know "segue", you parse that as "Segway". But the problem is, the resulting sentence doesn't make any sense. At this point, you either look it up to make sense of it and discover "segue", or you're OK saying things that don't make sense if they sound cool, and start using "Segway".