No, it's really not. As a user, I'd be quite fine with the first icon in the set.

The recent changes in the latest Google re-branding, for example, were anything but well-received. Even Chrome's icon is now smaller, and in a white box, with rounded corners — because everything needs rounded corners these days — for no apparent reason other than I guess we want to feel like a phone now.

The overwhelming majority of users are not shedding tears that their favorite product hasn't updated its icon in more than 3 months.