The Bundler 2.2 announcement includes context and a more detailed explanation of the changes in this version. This is a summary of the biggest changes. As always, a detailed list of every change is provided in the changelog.
We have improved our multiplatform support to better choose platform specific gems when appropriate but properly fallback to the ruby alternative as well.
We have improved support for Windows, and Jruby too.
We have shipped a bundle fund command to helps you discovered gems that you depend on that need funding.
Bundler 2.2 also includes many other improvements, such as many additions
to the bundle gem command, better integration inside ruby-core as a
default gem, and dozens of bug fixes