But what about technological advancement? Technological advancement is so fast that in 10 years, inference cost may drop heavily, and even deepseek 4.1 flash 1024 is very cheap and makes 80% in profit
Indeed. If current frontier models are already so disruptive now, we may have vastly better models in a few years but also the current models will have become significantly cheaper. Exponential growth (or shrinkage) is definitely at play here, and should not be underestimated.