Do they log that? Most smaller transformers in plants just have over pressure and maybe low level switches.
Hell, I can log it on my car for historic trending with an OBD-II to bluetooth adapter and some database software. I've seen guys who do this with sports cars and tablets or laptops. Cross-reference RPM's to elevation, gear selection and exhaust O2 levels. Things like that.
I don't know if they DO log that, but I don't see a reason why they wouldn't. Just to simplify maintenance.
Heck, I did it 10+ years ago at a school district I used to work for. I put every laserjet printer in the district into an SNMP monitoring app to pull fuser unit page counts and estimate the number of anticipated failures for the next year, total page count for the printer to estimate how many new printers to buy, receive reporting for specific type of paper feed errors to keep spare paper feed rollers on hand, things like that.
I'd be very depressed to learn that the only utilization of that fiber optic cable was a video feed.