Exactly. One could argue there have been computers since the 19th century, but they weren’t visible in society until after WWII and not commonly visible until 1970s or 1980s.

1000 industrial lift trucks of all types in 1926 across the hundreds of thousands of stations/depots according to the naval history paper in the link. Less than 1 in a hundred railroad depots IF they were randomly distributed. The military or merchant marine might have them at docks and forts. They would also be located

The Great Depression would slow down adoption due to less capital and so many laborers available looking for work. Those who like unique items might model them but I would expect them to be regularly visible during or after WWII.

Dave
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David Bott, modeling the A&Y in '34