Nice call on the Plex Sans, for at least one major reason: The capital "i" has a crossbar.
Any font that doesn't have a proper capital "i" (meaning one WITH CROSSBARS) should be rejected, especially for any kind of technical use. If you can't tell the difference between a lower-case L and a 1, the font is useless. And really the same goes for a capital O or zero.
Any font that doesn't have a proper capital "i" (meaning one WITH CROSSBARS) should be rejected, especially for any kind of technical use. If you can't tell the difference between a lower-case L and a 1, the font is useless. And really the same goes for a capital O or zero.