I work aviation... We are doing a digital glass cockpit upgrade to a customers plane. I am loading up the operating software. It takes 6 hours to do, but I only push a few buttons and then wait for it to finish.
I'm mostly a babysitter for this part, unless there is a problem, then I fix it and continue on. Sometime a software load goes bad and requires starting over, which takes up more time. Problems loading and incorrect procedures can be complicated and cause issues, so it's only me or the lead tech that do the software.