It's great to see more variable fonts being made. One thing I'm wondering about, though, is how variable "italic" is being handled: I see fonts with an "italic" axis where the design variation is really slant, and fonts that have an unexpected scale (for either italic or slant), like 0 to 100, or 100 to 1000.
Is this an issue in tools—that the tools aren't guiding font developers to use the most appropriate axis with the most appropriate scale? Or is it that font developers aren't sufficiently familiar with the registered axes and how they're defined? Or are there motivated reasons for font developers to do things the way they are in spite of how the registered 'ital' axis is defined?