tendency to ‘reinvent the wheel’, particularly by young enthusiastic well-meaning people
all the limiting factors to ‘student projects’ that are artificially constrained to grade rather than aimed toward real-world use, lack of real experience and resources
people are forced to reinvent at all levels of experience due to lack of access to prior methods and works
lack of coordination, collaboration and combining resources due to (sometimes intellectual but mostly financially) motivated competition and proprietary, confidential works.
but also don’t use the wheel just to uphold the norm, maintain reasonable skepticism