But that's a primary source. Generally, use of primary sources on Wikipedia should be limited because primary sources are easily subject to abuse. For instance,

But that's a primary source. Generally, use of primary sources on Wikipedia should be limited because primary sources are easily subject to abuse. For instance, even something as simple as a quote from X that "Y is great" can be problematic. Is that what X really thinks? Is there a quote from somewhere where X says "Y is not great?" Was X really in a position to evaluate Y? Wikipedia articles should generally be based on reliable secondary and tertiary sources. [https://en.wikipedia.org/wiki/Wikipedia:PRIMARY#Primary.2C_secondary_and_tertiary_sources https://en.wikipedia.org/wiki/Wikipedia:PRIMARY#Primary.2C_s...]