Simplicity & performance should be the main thing
maybe back of some features in Gutenberg is not such a bad thing.
Although, I do wish many more built in -
like a way to specify default site colours for example - so the colour picker is not such a pain to use.

I did not look at elementor or other builder for a while now

if only 10% of the energy and resources of paid page builders went into Gutenberg.. we would be in a different world.