Code freeze for 4.1

Hey team! We are really close to the official release of 4.1 (2/27).

The repo is now in a “frozen” state meaning that nothing will get in unless it is a bug fix or a massive performance fix.

You can still submit PRs but they will not be merged before early March!

The goal of the freeze is to make sure we are using the version enough before shipping it!

Thanks all!