[sf-lug] Are there two different models of X1 Carbon 4th gen (upgradeable and non-upgradeable)?

[Rick Moen]

Quoting Mike Higashi (mhigashi at gmail.com):

> Perhaps the key phrase to use with customer service is "user upgradable"
> instead of "customizable".

Yes, and Antonio Malcolm likewise made the point (offlist) that
Lenovo's rep may have simply misunderstood the nature of the question
-- certainly possible.  I expect Michael Shiloh's follow-up query
will clarify.