Unfortunately, I can't help with such a configuration either. But I can well imagine that the printer/memory comes to the limit with many simultaneous print jobs. I would try with 10 PCs, then increase. Another possibility is to set up a PC as a print server...

I'm not technically profound enough to know, but no one will be able to give you a blanket assurance, as too many parameters are responsible for whether all print jobs are executed. It is not the number of print jobs but the total file size of the print jobs that is more decisive, as the printer has a standard memory of 512MB. And using this to the full is probably not advantageous in terms of performance. Technically, it doesn't matter how many PCs connect to the printer (do they really all print at the same time?!). There is still the question of how the spooler is handled, PC or printer...