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That’s not a matter of being dumb, just that they never had a reason to question the difference. The proper way to answer that if you think there might be confusion is to recommend arch and note that they might just care about the DE, in which case there are simpler options. Otherwise you’re just being an ass.
Well, the real moment it becomes an issue is when a significant vulnerability is found after EOS. So I guess after EOS is when the sword of damocles starts hanging above every win 10 user…
Personally I’m on the edge of the ship just waiting to jump off once i have my new pc (probably next week).