Assistive Technology definition in ARIA 1.3 has id="assistive-technologies", whereas 1.2 has id="assistive-technology".
https://www.w3.org/TR/wai-aria/#dfn-assistive-technology
https://www.w3.org/TR/wai-aria-1.3/#dfn-assistive-technologies

I presume respec uses data-lt to generate the id of the dt element.

Last meaningful change to this DT element was in #1510 In particular, data-lt="assistive technology" was removed, which looks related. There is no specific mention to the assistive technology definition that I could find there. Not sure if this was an accidental change and we should be reverting it.

This is tricky because when using assistive technology, the link renders as href="https://www.w3.org/TR/wai-aria/#dfn-assistive-technologies".

We have a few occurrences of this: see assistive technologies. These generate a broken link. The only way to fix it is by adding an href attribute with an absolute path to the ARIA spec. Using [=assistive technologies=] doesn't work either. In addition, it renders the definition as normative, which we don't want, and I presume is one of the reasons why we still resort to as there is specific treatmen of this class in resolveReferences.js lines 232-237.