I think we are quite a long time from 6E becoming congested. The equpiment is just too expensive right now (nevermind the price of Wifi 7 equipment). In my pretty densely populated area I have zero other 6GHz networks visible from my place.

However, for the majority of people (basically exclude professional gaming) below 10ms will be perfectly fine and not noticeable at all, the importance of 6E wasn’t it’s speed but it’s improvement on more consistent connections, if WiFi 7 can improve on this, it’s a benefit to gamers and worth upgrading.