Never mind that the biggest part of the classic finder experience wasn't the look-and-feel, so just a theme won't help you much.
And speaking of modern screens, even if you get a copy of the OS 9 font (Chicago?), it would look quite odd on high resolution, especially if it's anti-aliased.
And I definitely agree about the weird issues we've got with screen sizes today. I rarely get something in the "goldilocks" zone, either it's all Material/Aero with yuge margins and white space that would make Jan Tschichold blush, or its old UIs that are just a bit too small (try running the aforementioned Worker file manager on a HiDPi screen).
Mac OS 8 migrated from Chicago to Charcoal, I think. Chicago was resurrected as the UI font on the first iPods because it was a similar situation as the original Macintosh that Chicago was designed for (low-res monochrome screens).
And speaking of modern screens, even if you get a copy of the OS 9 font (Chicago?), it would look quite odd on high resolution, especially if it's anti-aliased.
And I definitely agree about the weird issues we've got with screen sizes today. I rarely get something in the "goldilocks" zone, either it's all Material/Aero with yuge margins and white space that would make Jan Tschichold blush, or its old UIs that are just a bit too small (try running the aforementioned Worker file manager on a HiDPi screen).