NeTEx is not a panacea and there are also a number of potential disadvantages to using it

• Additional complexity from using a large, generalised model. See ‘Is NeTEx hard to understand?’
• Fragmentation of semantics from generality see ‘Does increased generality make NeTEx is harder to work with?
• ‘Addition computational expense for processing large XML models with extensive integrity checks..
• Limited expressiveness of XML
• Slow speed of standards process