I think HCS should consider adding it. It makes ASTRA more intimate & human like. Hopefully can turn into more sales. I'm new, know nothing of coding & still learning Voiceattack/Astra, but is it do able without needing additional program? I think to make command & response (only) should be simple enough, am I right? To make a randomized responses is another issue.
It was (and still is) there in the ASTRA demo video.
As for single word issue, I don't think "ASTRA" can be easily triggered by accident. I can be wrong though but then we have option ... "Hello ASTRA"..etc.