Nearly every store is sold out for X25-Es, both for 32GB and 64GB models.
Has Intel stopped production of these SSDs?
The ones that do sell them are typically $100-400 more than what they are priced at ($380-$400 pricing, out of stock), places that say they have them = $500-$1200.
Or is it just because they are so popular?
For more complete information about compiler optimizations, see our Optimization Notice.