Micron’s still around and doing reasonably well. They’ve had some struggles in the last decade or so and no longer are able to produce all their products in North America - they’ve had to take some production to China to remain cost competitive.
https://en.wikipedia.org/wiki/Micron_Technology
“In February 2019, the first microSD card with a storage capacity of 1 terabyte (TB) was announced by Micron.”
That’s pretty impressive.