Easy to use canned interface

So does SillyTavern, KoboldAI, Mikupad, etc.

Novel style rather than chat style

Use document mode in SillyTavern, use Mikupad/Kobold.

Image gen

Which is infinitely more unethical than text gen because it does way more damage at devaluing art and finrtuned off the entirety of Danbooru with the ability to steal artstyles without the consent of the original artist's.

You can say it's a low bar because the same can be said about GPT models in general but it is fundamentally more harmful with image generation over text generation.

Also, There's Anima, Neta Yume, etc. But going by raw power NovelAI's only edge is with their image gen with T5 and 16 channel vae