It seems more complex than I thought. The config makes it even less likely to
be used by friends/family.
And you're right again, I didn't think about the hardware. One more downside.
My perspective is always the random normal user who's privacy conscious. To
me it would be the rare case of "I don't have my computer with me, but I have
to check my emails".
Considering all that, the Tails method isn't vital.
Nonetheless, if more people I know are willing to use GPG for emails, I'd go
along with it.
