On Wed September 2 2020 16:58:18 Steven D'Aprano wrote:
> That word, "monopoly", I don't think it means what you think it means.
>
> https://www.litmus.com/blog/infographic-the-2019-email-client-market-share/

While agreeing with your definition of monopoly I was initially at a loss
to explain how Apple has 27.6+8.5+7.5=43.6% email client market share with
only 13% of the smartphone market and 9.4% of the desktop market.

https://www.statista.com/statistics/272307/market-share-forecast-for-smartphone-operating-systems/
https://netmarketshare.com/operating-system-market-share.aspx

Then I see that Litmus is analyzing which clients opened their spyware
emails rather than a scientific survey of the industry.  I also checked
a half dozen other email client market graphs and in each case they were
based on the same bogus Litmus data.

It could be that more of Litmus spyware emails are sent to Apple
customers, or that Apple email clients have weaker defenses against
email spyware.

--Mike