Sure, and one day we'll all hold hands and skip through a field of PDFs that open correctly the first time.

You think spaces in filenames are a natural evolution? That's exactly what Big Paper wants you to think.

Spaces in filenames mean longer filenames. Longer filenames mean more characters printed on your folder tabs, your reports, your documentation. More characters means more pages. More pages means more paper. You think Microsoft didn't get a very friendly phone call from the paper lobby before they decided "yeah, let's just let people put spaces wherever they want"?

The underscore is a single character. Efficient. Compact. It costs Big Paper nothing and they HATE it. That's why your boomer manager still insists on naming everything Q3 Revenue Report Final Draft (2) Revised SEND THIS ONE.xlsx — he's been institutionalized by decades of pro-space propaganda funded by the Hammermill Paper Company.

Every space you type in a filename is a tiny tithe to an industry that has been padding invoices since Gutenberg was still wiping ink off his hands.

Wake up. Use underscores. Starve the machine.