https://www.smh.com.au/sport/soccer/a-game-that-will-go-down-in-history-match-with-trial-rules-gives-glimpse-of-future-without-headers-20210927-p58v0h.html
A game which trialled limited and no heading. With further evidence emerging of brain damage caused by heading the ball this may become more of an issue. In the first half they allowed heading from free kicks and corners but not goal kicks or punts, so the ball had to bounce. Arsenal fans are occasionally used to that anyway.
In the second half there was no heading at all, which seems to have been quite boring.
I can see limits coming in in the future. It's already happening in kids training.
As a side note I think rugby is now trying to limit contact training to 15 minutes per session. That will be impossible to monitor. The Wallabies coach has already said he doesn't really bother.