Think memory chips are cyclical stocks?

Samsung made back 40 years of profit in 1 night.
7/7 earnings guidance: Sales of 171 trillion won, operating profit of 89.4 trillion won, up 1,810% YoY.
Q1's 57.2 trillion had already blown up, Q2 directly hit 89.4 trillion. Kim Yong-kwan said in an internal meeting: "This year's profit surpasses the cumulative total of the past 40 years."
40 years of accumulation matched in just 1 year.
How? AI turns HBM into the new must-have. Every GPU needs HBM pairing; HBM3 evolving to HBM4 doubles capacity and bandwidth, and supply can't keep up.
Samsung's sixth-generation HBM sales exceeded $1.2 billion by the end of June. The 90 trillion won buyback plan, if implemented, would be the largest in South Korean capital market history.
SK Hynix listed on Nasdaq on 7/10 with a 44 trillion won ADR, challenging the largest foreign IPO in the U.S.
Nvidia's Kyber architecture is reportedly delayed by 1 year due to PCB difficulties, causing PCB makers' stocks to slump. Intel Xeon prices rise 7%-12% in July. Broadcom renews its contract with Apple until 2031 for custom ASICs.
GPUs are snatched up, and memory becomes the next battlefield.
With a 7x P/E ratio, how long can memory chips hold up?