It won't come as a surprise that servers are solidly built machines, designed with pragmatism in mind rather than aesthetics. The resulting products (and looking at standalone servers mainly) will take more than a few knocks and bumps than consumer PCs before they give up the ghost.
Most server designs have been tweaked over decades rather than being dictated by looks, servers tend to use different, tried-and-trusted components sets as well. And just to give you that extra peace of mind, they will usually come with an option to upgrade the warranty to next business day, multi-year, onsite warranty.
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