The problem is that the people with decision power over software are usually not the ones who actually use it and latency issues are more of a subconscious thin

The problem is that the people with decision power over software are usually not the ones who actually use it and latency issues are more of a subconscious thing. Slow programs just feel less good to use until they reach a pretty high threshold where it feels unbearable. For speed good enough is just very far away from good (factor 10-1000)