Super disappointed in Amazon for not at least keeping the 25 years of content online. If nothing else, recent reviews will be valuable for another 1 to 2 years and instructional content for at least 5 years. A bigger loss is that the overall site content documents much of the first 25 years of serious digital photography – an important and unique historical record due to the consistency of the editorial focus and review format. And Internet Archive is unlikely to capture it well due to so much CMS-based chart and hi-res RAW content in test reviews.
(BTW, I don't agree with those saying mobile photography/videography has (or will soon) make DSLR/mirrorless irrelevant. As useful & impressive as mobile imaging is, larger formats and interchangeable lenses still enable important capabilities for pros, semi-pros and serious hobbyists that mobile can't.)