[hilariously]

It's only a few years old and cross browser support hasn't been amazing until lately so most people do not know about it at all.

[tantalor]

https://caniuse.com/mdn-html_elements_a_text_fragments

First support was Chrome 80 (Feb 2020) and Opera 67 (Mar 2020).

Safari picked it up in 2022. Firefox in 2024.