Comment by toast0
Google Mail and Calendar was fine; Google had an exchange connector at the time which worked well. (or well enough)
But maybe Google would have updated their WinCE apps to WP7 if Microsoft didn't make them throw all their work away.
This wasn't (only) about Google refusing to make apps for the WP, it was Google actively preventing WP apps from accessing their services where they could. Microsoft made a very nice YouTube client, for example, and Google simply denied YT access if they detected you were using it.