Because you have a sample of one that failed doesn't mean it's a bad product. Also you are in the beginning of the famous Bathtub Curve (read https://en.wikipedia.org/wiki/Bathtub_curve ) you may have an early death and not one due to a bad design.
Since the OWC worked well, I'd get it replaced under warranty and carry on.
I'm thinking about getting a 2 bay hard drive enclosure that is hot swappable that I can do a Raid 1 with.
I recently got a OWC Mercury Elite Pro dual bay and the enclosure just died on me after only a few months of use.
I'm looking that this Lacie model: https://www.lacie.com/products/big/2big/#specs
Probably the 2big Dock Thunderbolt™ 3, so I'm just wondering if people have recommendations/experiences they would like to share. Thanks!