Well the operating systems we had that were capacitive touch based operating systems were iOS (2007), android (2008), webos (2009), windows phone (2010), MeeGo (2010).
windows phone gained the most significant share following iOS and android but google continued to break functionality for windows phone users and didn’t make their apps available for the platform. That pretty much killed windows phone. Other developers much smaller than google seemed to manage to create windows phone apps no problem.
Symbian was a crap capacitive touch OS because they failed to rebuild from the ground up. Blackberry had the same problem due to being dpad and button driven. Windows Mobile was built for a stylus rather than a finger.
The third player that could have been successful (windows phone) was crippled by Google’s anti-competitive behaviour. Windows phone was a direct threat to Google’s ability to collect user data that they engaged in immoral business practices to kill it off (deliberately breaking stuff that Microsoft had built, not making their own first party apps available). A company the size of google, who likes to be perceived as a cross-platform player, would definitely have not had any resource issues building and supporting windows phone apps.
And this apparently from a company that is ‘open’ and cross-platform.