Ok so I haven't upgrade yet, but I would like someone here to challenge my logic because I really like the aesthetics of the HTC one. For a phone, I really like survivability. Especially a phone that can last for more than four years. One of the gripes I have with the HTC one was that it has a non-removable battery. At first, I didn't really mind since I can get portable chargers and what not. However, I then started to think about the long term quality of the battery. I would think that battery would start to degrade after two years. With the S4, I can easily just slap a new battery when the old one starts to degrade. I just want a phone that would last for four years and maybe potentially more.