We don't have a marketing department, so we're happy to take suggestions on our messaging!

What makes it modern are the ideas behind it: the column-oriented layout, support for lightweight encodings such as FSST and FastPFOR and support for pre-tessellation. Also, enabling doing more computations on the GPU instead of the CPU, which are made possible thanks to modern graphics APIs like Vulkan and Metal. I agree that it is better to be specific about these things (if that is your gripe with it), but there's only so many characters that fit into a title. ;)

It should be backed up, for sure. Like how is this modern?

In this case it's the column format for attributes and the newer encodings. Things the industry wasn't doing a decade ago.

Although the word is overused, hindsight can be a huge advantage in design.