Who buys a two year old camera? (18 months technically) I guess I do.
You see these days there are two types of digital cinema (video) cameras. There is the compact, affordable, feature changing type like the Sony A7 line, or the slow to deliver Canon 5D line. And there is the high end stuff. Arri Alexa has a 8 year old sensor. Still working very hard. The MX sensor in the RED one is still amazing. ( the 2 minute boot time is not )
So why is it these high-end cameras have stabilized? Firmware. Recently the school I teach at just got a Sony F55. With new firmware the camera can record at higher bit rates, unlock high speed settings that weren’t available when the camera was released. Now the Fs7 I bought is not an F55, but as Alister Chapman has pointed out the Fs7 does 95% of of what the F5/F55 does. For me that is pretty awesome.