Understanding FTTH reaction video, wary of GPON vendoring

I'm reacting to https://www.youtube.com/watch?v=1ydIqqfjJkw

Excited to share with you what little I know about Fibre. Please do share any other tit bits. Here I want to focus on varying GPON standards and how to mitigate this problem and lack of knowledge. I don't want you or I locked in to some proprietary technology for such an essential service! ... https://www.youtube.com/watch?v=mAYFGIjUINc