Isn't this really only an old habit for the younger crowd.
'Cause I seem to recall my '67 Chevy pickup, '70 Dodge ambulance, and possibly '80 VW Diesel Dasher; having the ignition in the dash.
And it was the ignition on the steering column that confused me.
After riding my NT for a couple days, and then switching to my Griso. I still tend to give drivers who cut me off, a very angry turn signal cancellation.
Thankfully I did not learn to ride using my older brother's 60's era Triumph.