After a period of not displaying them, merge commits are now being linked again, with the added functionality of showing the differences between parent commits, providing an overview of changes in the branch. This improvement is achieved by executing a git diff between the two parent commits, enhancing the information available for code review. The updated approach aims to lay the groundwork for a more comprehensive code review system, which, in conjunction with existing code commenting features, is expected to significantly benefit large projects. Older merge commits might not show these differences if they were cached without the additional data.