Aren't most cloud computing currently almost completely HDDs at this point? At least, this is the impression that I get from looking at the case of Backblaze (w

Aren't most cloud computing currently almost completely HDDs at this point? At least, this is the impression that I get from looking at the case of Backblaze (which is probably the cloud storage center with the most public statistics on what they use). So far, the usage of SSDs is fairly minimal on the storage side, although I believe they are used at Backblaze some for operations such as bootup and caching. (https://www.backblaze.com/blog/hard-drive-stats-for-q1-2018/ https://www.backblaze.com/blog/hard-drive-stats-for-q1-2018/) I would agree on consumer systems (that often have one single boot drive), SSDs make a lot of sense. These days you tend to only see HDDs at the very low end. From a personal perspective, most of my PCs are completely SSD. But I also have a media server (the largest storage space being reserved for MKV copies of my personal DVDs and Blu Rays). This is composed of RAID arrays of 6TB HDDs. Right now, cost wise, the highest "common" SSD is 4TB SSDs are roughly in the $800-$1200 range. 4TB HDDs by comparison are quite cheap, as low as $89 for a certain Seagate model (I used the Western Digital Reds which for 4TB at the moment are a little higher, $115... for the 6TB model it is $178). While I definitely wouldn't say "HDDs will always be around", the price difference is very high right now to justify the superior properties of SSD. Backblaze seems to be in agreement here (https://www.backblaze.com/blog/ssd-vs-hdd-future-of-storage/ https://www.backblaze.com/blog/ssd-vs-hdd-future-of-storage/). I guess the question is how long it will take for large capacity SSDs to scale down in price for them to be competitive. Until that happens, I imagine HDDs have a decent future left, if not on consumer devices then at least as drives for cloud / data center storage.