In reply to Matt.

Why an Icon Picker Block?
What if I want an Icon just also within my text paragraph?

This needs to be better thought out if someone makes in integration.

I DON'T want 587 plugins of blocks for every "little" thing under the sun. Another thing where "Gutenberg" fails a lot.

And if I want to add something custom on my own to add to the (current) Editor?
Currently that is easy with a few lines of (mostly PHP) code. However, with "Gutenberg" I have to study Javascript and implement a build process for all this crap. Or alternatively install dozens of plugins where I don't know how good the (JS) code is.