Internally they were two very different things. WP7 was their old windows mobile with a new skin, while WP8 was the actual OS they had been working on for a long time. They felt the same but were very different. I guess they didn’t think it was worth the hassle trying to figure out how to handle that update.
I don’t know what was the deal with 10 though (I forgot it even existed tbh).
Microsoft didn’t even provide a proper upgrade path for it’s users. WP7 couldn’t go to 8 and same for Windows Mobile 10.
Internally they were two very different things. WP7 was their old windows mobile with a new skin, while WP8 was the actual OS they had been working on for a long time. They felt the same but were very different. I guess they didn’t think it was worth the hassle trying to figure out how to handle that update.
I don’t know what was the deal with 10 though (I forgot it even existed tbh).