I very much doubt that current manufacture varies much at all.
What could/would you change? To achieve any change would mean reinventing something, which would likely be very expensive and a substantial risk.
All of the machines in the film, and the huge majority that I have worked on, worked from combinations of indexing gearboxes and cam switches. Most of the machines that I was familiar with were built pre 1970, but one or two brand-spankers came on site. One in particular, a final exhaust machine for mirror lamp capsules, had been built for a competitor who could not get it to work and a second competitor similarly failed. We couldn't get it to work either, but did discover why it would NEVER work in the form in which it was designed - on all machines, the exhaust tubes are fitted into compression heads which contain a rubber (today usually a silicone rubber) insert. The insert is "pinched" onto the glass exhaust tube by one of various methods to form a seal. The rubbers on this machine were very large and no matter how much of various pre-treatments we gave them, they always seeped less than tiny quantities of volatiles from the silicone, into the lamps, which killed the lamps.
Today, you'd just use PLC controls, but the machines would be essentially identical. To make machines run faster, they just get bigger, so that the dwell time on the machine for each component stays about the same - to take the easiest example to imagine, think of final exhaust. To purge, outgas, exhaust and tip-off each valve/lamp just cannot be done ever faster, you have to work within the limits of what the laws of physics and chemistry allow. At the very least, pumping to a reasonably low pressure (a VERY long way from actual vacuum), through a 4" long, 1/8" bore exhaust tube takes quite some time.