WHY is the transition from Windows to Linux easy for some people?

After I'd closed the lid on the "Ubuntu is not Linux" , uh, mess, Eric over at Binary World has taken up the idea and tried to grapple with it. I don't know, maybe I should dig it up and check for a pulse. But I'm thinking again... (that's always a dangerous sign!)

Here's the nut of the matter: moving from Windows to Linux is easy for some people and hard for others. WHY?

For instance, why, when I first loaded Red Hat (version 5 or 6... memory blurs) did it feel like coming home? I dove right in and loved it. It just... made perfect sense.
For one thing, I'd had experience with a lot of other computer systems before Windows happened. Commodores, TRS-80s, IBM DOS with XTree Pro and Gold, Apple MacIntosh, and OS/2. I'd even spent some time hanging around mainframes! This was all mostly through job experience - I'd already had several jobs before Windows desktops started appearing everywhere.

*My* first reaction to seeing a Windows desktop was "ick! What did you do to this MacIntosh?" Probably Windows 3.1... with the Hot Dog Stand theme.

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