[aloknnikhil]

I think the whole purpose of ELI5, when done right, is to introduce you to the concept. Not help you master it. Similarly, analogies do help, especially for a non-native speaker.

[spectramax]

Introduction shouldn't be complicated to explain in plain english. Instead of introducing to the concept, it misleads from the beginning.

[aloknnikhil]

Fair enough. ELI5s wouldn't be necessary if the original abstract was good enough.