I did. I had a mechancial typewriters growing up (a "portable" one), and the first typewriters I took (almsot completely useless) typing classes on in Junior High School were mechanical.
But I'll note that the key-jam problem that QWERTY was intended to justify was when the hammers were in a seriously inconvenient place in the really -early- typewriters, and it's likely that the ones that any of us used (where you could just reach in and unjam the damned things) were a substantial step above that -- enough of one that even then, QWERTY was largely unjustified.
(no subject)
But I'll note that the key-jam problem that QWERTY was intended to justify was when the hammers were in a seriously inconvenient place in the really -early- typewriters, and it's likely that the ones that any of us used (where you could just reach in and unjam the damned things) were a substantial step above that -- enough of one that even then, QWERTY was largely unjustified.