It depends what you claim...
Need VMs? More transcoding-power? More cores? Its up to you ๐
My sys is from 2013 and there are some upgrade reasons:
AVX2 for dual-parity (not supported by my CPU),
Intel-NIC onboard,
DMI 3.0,
More PCIe-x16 slots,
More cores and so on.
But as long as the sys is running, i let it run...