Collaboration in UE4 now? Any changes?

Hi, half year ago i asked about collaboration in UE4, then there was only 2 things:

  1. assets migration
  2. any svn like programs to synchronise files

Did something chaged over time?

I’m just confused about situation like this:

2 men, one project, project files stored on any cloud server and synchronised via any svn like program, what happen if man №1 will work on level №1 and make any assets changes and in same time man №2 will change same assets and work on level №2, then both try save and commit their changes to svn, will there happen collapse?

Any tips, tutorials anything else about collaboration and such situation?