Let me add my opinion about this. I hugely use illustrator.
A cool thing could be an option to detach (not explode) a block and all its nested blocks if any from the original block.
With illustrator, you don’t have “blocks”, you have symbols (very similar)…and, for every symbol instance it’s possible to detach it from the symbol, if the symbol was scaled, it’s unlinked “as is”. At this point , depending on the illustrator version, the symbol instance becomes a group or a layer and is no longer linked to any symbol.
I use this feature every day.
In rhino, a quick way to turn a block instance into a group, keeping all styles (hatch, line styles) is missing.
It is possible the way Pascal told us, but it’s really time consuming.