That depends on your definition of high-availability. If high availability includes distributed writers, (global) sequences are not the best solution because generating unique sequence values requires synchronisation between all writers. In those cases, you might need to explicitly partition the ID space so that individual writers are guaranteed not to get in each others' hair.
This is like insisting - after the problem turns out to be harder than thought - that the worlds roads need to be completely redone to make them self driving friendly, so self driving can work.
Isn’t the whole ‘promise’ of AI that it doesn’t need any of those things?
The ones I think they are referring to a more like industrial control cabinets with DIN mounted breakers, which are indeed (paradoxically) less ‘old industrial’ looking. That Leviton board has a similar look, but with the standard bus bar type mounting in a heavy metal box.
The metal box does serve a useful purpose, which is protecting the flammable wood framing typical in North American construction from fire, where most European and Asian boxes are either much thinner metal, or plastic. Because their construction is often concrete and fire danger is much lower.
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