Why is SK Hynix losing so much market share and should investors be concerned?

I bought SK Hynix last year because every CEO and tech analyst was screaming from the rooftop that there was going to be a serious memory shortage and to me the price didn't seem to reflect that. I also guessed that the extent of the AI infrastructure cap ex would exceed expectations, but not with high confidence. I continue to hold that belief going forward, but not with high confidence.

I'm concerned about SK Hynix losing market share though and as someone without genuine expertise, it's a little difficult for me to discern why, if the trend will continue, and to what extent it's priced in. I believe SK Hynix has gone from something like 64% share of HBM and 39% share of DRAM last year to 250% and 25% respectively this year.

I'm tempted to move my money from SK Hynix into my other two main non index fund holdings, TSM and ASML. With those two, while it would be beneficial to have it, I don't feel like I need the technical expertise to evaluate if they will gain or lose market share, I can trust in their moat and reputation for high level execution.

I get that memory demand will likely remain high, and that at a PE of 6, SK Hynix is already pricing in a lot of risk/downturn, but everyone knows demand will remain high. Demand being high also in general tends to attract competition, a sector can be booming and those within the sector can perform quite poorly. While memory fabrication does have a moat, we have seen this start to play out. CXMT for instance has over doubled wafer production since the release of the first version of Chat GPT.