Enterprise SSDs are not expensive only because they have better flash chips, but they have much more of them.
A top of the line write oriented SSD comes with 4-7x more capacity than what it says on the tin, but that extra capacity is used for cell replacement rather than capacity itself.
Mixed use comes with 2-4x overprovisioning, and read oriented is around 2x IIRC.
I find these numbers to be way outside of what I have heard of. I would be surprised if you could give an example that comes with even 1.5x capacity. (4TB capacity, 6TB actual flash on chips, for example.)
Overprovisioning is much less aggressive than this in practice. A read-oriented SSD with 15.36 TB of storage typically has 16.384 TiB of flash. The same hardware can be used to implement a 12.8 TB mixed-use SSD (3 DWPD or more).
Enterprise SSDs are not expensive only because they have better flash chips, but they have much more of them.
A top of the line write oriented SSD comes with 4-7x more capacity than what it says on the tin, but that extra capacity is used for cell replacement rather than capacity itself.
Mixed use comes with 2-4x overprovisioning, and read oriented is around 2x IIRC.