> Large companies have often changed the depreciation schedule for server hardware to 6 years rather than 3. I think it remains to be seen if this is justified as it’s not as though the pace of change in hardware has slowed down by 50% arbitrarily.

Anecdotally, I bought a new desktop over 7 years ago and it still feels blazingly fast with plenty of room to grow. And the cost of a new machine is prohibitive, so a replacement at this time doesn’t feel very compelling.