Samsung has confirmed that they have discontinued the Samsung Series 5 550 Chromebook model. The company said that interested customers should consider Samsung Series 3 edition as the replacement model.
Series 3 is not a good replacement for the Series 5 model as the specifications are worse. Chrome OS is a lightweight operating system sure but 2GB RAM is too low for the web apps of today. Especially if you tend to run more than a few tabs including some streaming music in the background.
The problem with Google Chromebooks is that consumers have extreme options. They can either go for the ultra-cheap products like from Acer and Samsung or they can go for the extremely expensive option in the form of Google Chromebook Pixel. The mid-range options are not very good.
The recently launched models from HP and Lenovo are compromise products as well.