AI memory storage companies and potential futures

There’s huge hype now regarding SNDK, WDC, and STX. All three have had parabolic growth in this past year or so, especially so for SNDK. All three seem to fit well into this current push for AI sector. Yet all three had been relatively “old” companies just recently exploding, especially for SNDK. I honestly am not sure if these are just hype, or if they truly are hitting their stride. I also am not quite sure if SNDK specifically is still worth getting into right now, versus WDC or STX? I would love to hear different perspectives on this, or some comparison and contrast for these three, and also what everyone thinks might be a better investment currently.