> I'm not sure how many 4U+ systems are purchased—perhaps some more now that perhaps GPUs cards may be a popular add-on. Going from what i see at eCycle places

> I'm not sure how many 4U+ systems are purchased—perhaps some more now that perhaps GPUs cards may be a popular add-on. Going from what i see at eCycle places, 4U dried up years ago. Everything is either 1 or 2U or massive blade receptacles (10+ U). We (the home-lab on a budget people) may see a return to 4U now that GPUs are in vogue but i'd bet that the hyper scalers are going to drive that back down to something that'll be 3U with water cooling or so over the longer term. We may also see similar with storage systems too; it's only a matter of time before SSD gets "close enough" to spinning rust on the $/gig/unit-volume metrics.