In case you need your heart broken, there's evidence to suggest Scratch Team were seriously considering allowing blocks to placed inside of variable dropdowns.

Evidently, that fell through. Something didn't work.

Just looking at Snap! for inspiration-- wait a minute..

First look at a redesigned Scratch Cat, possibly for 4.0

Global custom blocks have been released for Unsandboxed.

Full changelog in the article.

If Scratch-Blocks 2.0 was nicknamed "spork" during development, what should I call this? spatula?

So I can say for certain that Scratch 4.0 will depend on modern Blockly, which for now is being held together by the old GUI code from 3.0

Useless Scratch facts # 2:

Let's play a game! Which one of these was rendered in Scratch 4.0 and which one was rendered in Unsandboxed?

An update has been released for Unsandboxed.

Changelog is in the article.

In Portuguese, the translators decided that uppercasing all of the hat blocks would be their sin of the day.