Emotions, after all, are just the brain's way of processing lots and lots of information that can't be compared on a rational basis. Part of that information is "What do my friends use?", part of it is "How does it fit into my life?", and part of it is "What does it say about me as a person and what I value?"

But all of those factors are still subject to reality: if a new product comes out that fits into your life better, eventually somebody's going to break ranks and adopt it, and they'll be able to explain to their friends, authentically, why they believe it's better. All of the catalysts I mentioned in the original post reflect changes in the ecosystem: the shift from ease-of-use to features & compatibility reflects more things you can do with the product, the shift from features to reliability reflects using the product in more consequential situations, and the shift from reliability to branding & maintenance reflects how you're perceived for choosing the product.

The Tipping Point describes the mechanism for this in consumer markets well. Product adoption starts off with Mavens, people who like trying & evaluating new technology on its own merits. It spreads through Connectors, who have a wide circle of friends and enjoy telling them about interesting new things that might benefit their life. Finally, the holdouts are convinced by Salespersons who explain, point-by-point the benefits and answer objections.