Thanks for pointing out the real numbers. In my defence, I was thinking "conservative for the near future", so the next 5 years or so. An of course giving 9M users a bad experience isn't that great either.
If we're being pedantic, it's probably worth noting that the "99%" was a completely arbitrary assumption, and trying to run statistics based on one anecdote and an unfounded assumption is not going to produce accurate results.
True. I suppose the main point is that with a billion users, even some "small fraction" of users having problems, is going to translate to a lot of people having problems.
Honestly, if Google took support even half-seriously (or: they considered eg: users of gmail their customers, rather than just their advertisers) -- these kind of issues wouldn't be so bad.
I do think it's just a question of time before Google relegates itself to irrelevance through a strictly inferior product though.
So, with a conservative one billion email users, only 10 million users see this problem.