Among the more interesting developments to affect theatre practice lately has been certain adoptions of Non-Human Agency - basically the concept that other-than-humans may be capable of independent action.
I wrote about this at length for a special edition of the University of Tartu's open-access journal Methis, following the presentation of these ideas at a conference at that same university in 2019. Written as I was intensively developing an opera and coinciding with some health issues, it's publication is something that I look at with some sense of pride and achievement.
The publication is available here (21-pages PDF),
https://ojs.utlib.ee/index.php/methis/article/view/18443
...while the full edition, which contains some rollicking papers about technology and percpetion in the theatre, with a particular focus on the Estonian context, is available here:
https://ojs.utlib.ee/index.php/methis/issue/view/1297/62