They are still used, but not sure how since i have not been professionally working in that industry for over 12 years.
Code:
cnc@NVME1TB:~$ lspci -v | grep IRQ
Flags: bus master, fast devsel, latency 0, IRQ 25
Flags: bus master, fast devsel, latency 0, IRQ 26
Flags: bus master, fast devsel, latency 0, IRQ 27
Flags: bus master, fast devsel, latency 0, IRQ 28
Flags: bus master, fast devsel, latency 0, IRQ 30
Flags: bus master, fast devsel, latency 0, IRQ 31
Flags: bus master, fast devsel, latency 0, IRQ 40, NUMA node 0
Flags: bus master, fast devsel, latency 0, IRQ 55
Flags: bus master, fast devsel, latency 0, IRQ 39
Flags: bus master, fast devsel, latency 0, IRQ 33
Flags: bus master, fast devsel, latency 0, IRQ 35
Flags: bus master, fast devsel, latency 0, IRQ 36
Flags: bus master, fast devsel, latency 0, IRQ 38
Flags: bus master, fast devsel, latency 0, IRQ 34
Flags: bus master, fast devsel, latency 0, IRQ 37
Flags: bus master, fast devsel, latency 0, IRQ 66
Flags: bus master, fast devsel, latency 0, IRQ 85
Flags: bus master, fast devsel, latency 0, IRQ 67
Flags: bus master, fast devsel, latency 0, IRQ 56
Flags: bus master, fast devsel, latency 0, IRQ 87
cnc@NVME1TB:~$
But we are over 16 for sure, that was the main limit.
