Using the word "never" saves you from having to state when the web ceases to be the dominant platform. When do you think this will be?

Something like "the web will never be the dominant platform, except for the past 10 years and the next 10 years" does lack a certain punch, but at least it would be specific :-)

(And I appreciate your taking the time to write your blog post, and don't want to be a jerk, but the definition of never is "at no time in the past or future; on no occasion; not ever," so maybe you could rephrase to something like "the web cannot continue indefinitely being the dominant platform," which at least acknowledges its current strength.)