This is actually a question you need to send to Ableton. We developed the ARA standard, but we cannot implement this into a DAW.

What is ARA support?

Type. Audio Plug-In Interface Extension. Audio Random Access (commonly abbreviated to ARA) is an extension for audio plug-in interfaces, such as AU, VST and RTAS, allowing them to exchange a greater amount of audio information with digital audio workstation (DAW) software.

What code does Ableton use?

Ableton Live is written in C++. Live itself was not prototyped in Max, although most of the audio devices were.