That is true. But in cloud our hands our tied, we cannot really switch from one one generation to another so easily. GCP has so far never launched a new chip while keeping the price same or lower. We did same cost/perf analysis on newer generation chips like Ice Lake from Intel and even Milan from AMD in the form of N2D, but both are quiet expensive for the performance uplift they provide. The unique thing about T2D is that the price is competitive with 10 year old E2, which has been the case only for ARM based CPUs like Graviton and Ampere Altra (T2A from GCP)
ETA: Since you are using Go and targeting a specific modern CPU, you may also get a measurable benefit from setting GOAMD64=v3, so the go compiler generates code using AVX2, BMI2, LZCNT, etc.