Go 1.21 release candidate is available.

It has some interesting changes in my opinion:

• clear() for clearing maps
• new slices package for common operations on slices
• new maps package for cloning and comparing maps

And some somewhat interesting ones:

• min/max function directly in the language without a package (could have easily been in math package, but then again, you can min/max strings with this?)
• structured logging package

Some other optimizations and improvements.

What do you think?