It's more fun to chase tenths when the dimension on the drawing is a fraction.
Doesn't apply as much to metric of course where everything is already in mm or portions thereof.
This is a good reminder of what is needed (imperial of course)
If you ever work in a place where they are dragging junk in the door to be fixed every day, you would realize that hobby machinists are very often way more anal and whimper on about a 1/2 thou.
I see it all the time on these forums. I believe it is simply because the hobbyists have no real-world concept of what is required and expect everything to be within .001.
I've never owned a tenth indicator. Occasionally I am tempted to buy one. Then I remind myself that nothing I do requires that level of accuracy and none of my machines are capable of producing it.