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Ironically, for a long time very small mini-ITX cases were the only kind available. You may just be looking in the wrong places; check e.g. mini-itx.com's list.The thing is, those tiny cases aren't intended to support higher end (and higher TDP) components, and that limited their appeal. The bigger mini-ITX cases came about later with cases like the Bitfenix Prodigy, which were designed to support the full-size CPU coolers and GPUs demanded by the mid- to high-end gaming PC market.It's only the ultra-SFF (<10L) cases that support higher end components that are a relatively new thing.
Ironically, for a long time very small mini-ITX cases were the only kind available. You may just be looking in the wrong places; check e.g. mini-itx.com's list.
The thing is, those tiny cases aren't intended to support higher end (and higher TDP) components, and that limited their appeal. The bigger mini-ITX cases came about later with cases like the Bitfenix Prodigy, which were designed to support the full-size CPU coolers and GPUs demanded by the mid- to high-end gaming PC market.
It's only the ultra-SFF (<10L) cases that support higher end components that are a relatively new thing.
