Do you have a hilarious test suite that physically prints 30 complex designs to ensure things are ostensibly working? Do you have a room with dozens of the printers live at a given time?
Yes, I have a room with 100 label printers. They aren’t powered on. If I make changes to the built-in driver then yes, I take out the printers and make sure they function as expected. The way my app works is by sending raster images to the printers (vs explicit commands for text, barcode, line, etc). Because of this, much of the pixel-perfect testing can happen via PDF generation, which is the other core feature of Label LIVE - submitting PDFs to operating system printers (drivers), or generating and saving PNGs/PDFs to the file system.
I imagine a giant knife switch on the wall outside the room, to power up all the label printers at once while you're safely outside wearing a lead apron.
I once visited a HP site in Italy where they had hundreds of inkjet printers on racks running tests. I think it was reliability testing rather than software.
Interestingly, and perhaps ironically, Label LIVE is used by FAANG to print labels for their mobile testing labs where hundreds of mobile devices run their apps on real hardware, server racks, super computing clusters, and labeling prototypes.