10ms is an extremely generous estimation of the amount of lag you'd get playing with a device like Stadia at any rate.
Jitter is what really kills it. I found out that my ISP (who own switches in the basement) limits bandwidth based on a rolling time window, so whenever someone in the house starts a download they can briefly saturate the entire link. Wish they'd know how to configure QoS on their very expensive network gear.
Yep if people were bothered by 10ms then everybody would be on CRTs. But... nobody is doing this except some extreme speedrunners and fighting game players.
Typically, not even fighting game players. The last holdouts are retro enthusiasts and Smash Bros. Melee players.