Microsoft's efforts to build out the app ecosystem for Windows Phone 8 appear to be reaching a plateau. Buried in today's announcement of the Nokia Lumia 928 for Verizon was the fact that the Windows Phone Store now has 145,000 apps, up only slightly from the 120,000 apps announced in October. The figures suggest momentum has slowed after the Windows Phone catalog doubled in size over the first half of last year. And it raises the question of whether developers are shying away from a platform that is still struggling to catch on in North America.
Microsoft has won over some high-profile developers this year, attracting new or redesigned apps from YouTube, Hulu, and Foursquare. The company says that the vast majority of the most popular...