I think the handplane was still as relevant as ever, way into the 20th century. Exponential rise of the population ment an increasingdemand for wooden structures. One building boom after the other. And the small electric motor was still far away.
Most people were farmers by the late 19th. C.. At least those living WAYYYYYYY out in the newly opened country. They needed some simple tools to build their houses,barns,and probably some simple furniture.
The other important factor to consider is until Edison came along with the incandescent lamp, there wasn't any electrical service. Even after the development of electric lighting many areas didn't have electricity or other power systems to run 'modern' equipment.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)