I know a couple of cyborgs and have met some others. They are not that uncommon.
Does one of them live in a T-shaped building located on a small island separated from the mainland?
Yes, how did you know? ... :-D For real, no.
Seriously, if 'cyborg' is defined as an intelligent animal with machine implants that link to the central nervous system
then there are quite a few of them. The cost of prosthetic arms put them out of reach for a lot of people.