poor physical resilience, poor data integrity and retention at both rest and in flight, a mix of standard and proprietary protocols, a massive standards shitshow, utterly uninteligible branding on speed grades, and a market for fakes and bullshit claims that makes buying them a miserable gamble

microSD in particular is a product category that I find baffling. it is so physically small that it becomes useless as a portable storage medium because you 100% will lose it, and if you need any appreciable density or performance on the thing it's also very expensive, which makes losing it all the more terrible. so most of the time it's only getting used for expansion storage, which would be far better served by the device just having more native storage using a far better device type.