Release Notes:
https://docs.zen-cart.com/release/whatsnew_2.1.0/

Changed Files:
https://docs.zen-cart.com/release/changed_files-v2-1-0/

The build can be pulled from
https://github.com/zencart/zencart/releases/tag/v2.1.0

Known Bugs:
https://www.zen-cart.com/showthread....-Bugs-in-2-1-0

Release Specific Upgrade Considerations:
https://docs.zen-cart.com/user/upgra.../#zen-cart-210

FAQ:
Q: "How should I upgrade?"
Answer: Follow the instructions in the documentation here: https://docs.zen-cart.com/user/upgrading/

Q: "When will plugins be ready?"
Answer: Plugins that were updated for 2.0.x will likely work in 2.1.0. Plugins that were not will need significant changes to work under PHP 8.2. Follow the plugin's support thread for more information.

Q: "When should I upgrade?"
Answer: An upgrade should be something you plan out, as your customizations may need to be re-integrated into the changed files. We recommend that you set some time on your calendar for doing your upgrade when your website or business is the least busy. But if you are still using PHP 7.4, you should prioritize upgrading before your site breaks due to hoster changes.