Show me the source. Let the markets do the talking.
Micron has their entire 2025 inventory sold out and still trying to ramp up their supply chain with equipment shortages from vendors. Their Boise ID1 fab is probably a shell till 2028.
CXMT managed to qualify HBM2 but thats still 2-3 years away from catching HBM3E. So I don't see China as a threat.
Samsung has the equipments and they have been trying to qual for more than a year. Everyone knows they will eventually be able to qualify it. Not forgetting semis are considered "tariff free".
SK Hynix was the only real big player in the HBM market. The chip market is a net sum game. Meaning, there is that much market share and for one to win, another must lose.
HBM4 is not a major leap from HBM3E. Its the same technological node, just a derivative