You skipped the T4 which was in between Volta and Ampere, as well as the P100 between K80 and V100. So I'd say "meaningful chip changes" is closer to every 18 m

You skipped the T4 which was in between Volta and Ampere, as well as the P100 between K80 and V100. So I'd say "meaningful chip changes" is closer to every 18 months. The T4 though isn't a "big part", but for people who fit within its envelope, it's a huge win (since it's cost is so much lower). A lot of deep learning folks had built out Turing-based workstations in that time period, and I think they're still reasonable value for money.