The IEC 60601-1 4th edition is organized by hazard, not by clause. That is not a cosmetic change, and it decides how you read every draft that follows.
Edition 3.2 of IEC 60601-1 is organized by clause. You want leakage current, you go to Clause 8. You want mechanical hazards, you go to Clause 9. You want excessive temperatures, you go to Clause 11.
The 4th edition is not built that way, and the difference is not cosmetic. It changes what you look up, how you scope your project, and what a gap analysis against it actually has to do.
Here is what sits underneath the change, why it was made, and how to read the drafts without getting lost in them.