Variable fonts collapse the entire design space of a typeface family into a single file. Weight, width, slant, optical size — each becomes a continuous axis of infinite interpolation rather than a discrete set of static instances.
The letter is no longer a fixed thing. It is a coordinate in a multidimensional space, and every position in that space produces a valid, intentional glyph.
The promise of variable type is that the designer and the user share authorship. The font file is not a finished artifact but a design space — a territory of possibilities that awaits exploration.
// font-variation-settings: 'wght' 100..900, 'wdth' 75..125
type is never finished