Why did you remove "PNG" and replace it with "Latency"?

[Mel-22110]

Replacing Ping and RTT with Latency

Prior to patch 1.21, Overwatch maintained two estimates for your network quality: RTT and ping. Your RTT (round trip time) was measured as the time between sending a packet to the server and hearing a response, which included some application processing time on both ends. Calculating your ping, on the other hand, required us to timestamp every packet at the exact moment it was sent or received, something that became much more expensive after we patched for Meltdown & Spectre. Without these ti…

For reference.