Increase font shortcut: Command + Shift + . no longer works
Mac OS Mojave 10.14.6, 3.2 GHz Intel Core i7, 16 GB 2667 MHz DDR4, Radeon Pro 560X 4 GB
Illustrator 23.1.1
Increase font shortcut: Command + Shift + . no longer works.
Decrease font shortcut DOES still work. Super annoying.
EDIT: I just realised if you press the decimal point on the number pad it works. The wrong "." seems to have been assigned the shortcut.

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Jimmy commented
CMD-SHIFT-> and CMD-SHIFT< are both no longer working for me on the current build 29.7.1 on macOS 15.6.
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Brad Fischer commented
Same issue. I tried editing the keyboard shortcut using the {period} key, but that didn't solve it for the Shift-Command-{period} shortcut. But yes, using the decimal key on the keypad works instead
Weirdly, though, the command to increase size in steps DOES work ( Option-Shift-Command-{period} )