Canon sensors achilles heel?

Agreed. I've had no issues with my Canon sensors for years. My 32Gb memory card fills up too quickly as it is with my 5D MKIII files and the files are large enough for everything I need to do with them so the size is obviously a non-issue. Color is fantastic. Low-light is fantastic. Is there something wrong with my camera's sensor that I'm missing here?
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Nick Dollimount
Canon 5D Mark III

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