Is this an enterprise SSD?

That's why Desktop SSD are considered 'more expensive' in business.
Applied to the wrong work loads, I fully agree... especially as there are few people that understands the pros and cons of each.

It's like comparing the long road driving in a Mahindra Bakkie vs taking the expensive Mercedes/BMW roadster to pickup your building sand.
 

How does one define an enterprise SSD? Is the "Kingston Data Centre DC500R, SEDC500R/480G" considered as one?​

An enterprise SSD is capable of handling 24/7 operations, has a long lifespan, features power-loss protection, and provides reliable performance. Indeed, the Kingston Data Center DC500R is usually regarded as an enterprise-class SSD, particularly for use in read-heavy servers.