First thing I do on every thinkpad. It would be very interesting to know what percentage of customers actually wants that Fn key in that location instead of Ctrl.
If Ctrl is on the outside I am guaranteed to hit Shift when I push them both with my pinky straight up.
I have two Lenovo laptops in front of me right now.
The key straight up from Fn on the Ideapad 3 is a pipe. On the Thinkpad the shift key is the correct length (two keys wide).
The two have opposite Fn and Ctrl keys.
Consistency, am I right?
Muscle memory is a thing, and even the same manufacturer isn't doing things the same way between models.
I'm surprised so many people express any preference, though. My take is that the Fn key is an abomination and it's not present on desktop keyboards so either choice of location is wrong. If I could, I'd remove both Fn and the 'Windows' key. Neither my Chromebook nor the T40-series Thinkpads I first used have these keys, and they are noticeably more comfortable due to the larger Control and Alt keys it permits.
I'm also surprised people complain about this but not about the layout of Apple laptop keyboards, where 'fn' is also in the corner.