DxO has made a mess of this.
Before PL9 they documented that dop was compatible across platforms, and that was largely the case. The one exception was that profiles (ICC/DCP/LUT) were written to dop as absolute paths, which isn’t even portable across computers necessarily. Other issues with compatibility that I’ve run across (which haven’t been many really) have been fixed as bugs.
I started pointing this out in PL4 at least. DxO then repeated the mistake with LUT files in PL7. As I’ve told them many times, all they need to do to at least make it possible to work across platforms/computers without modifying dop is to add a known directory on each platform for PL to look for profiles in (as is the case with presets and more) and write filenames instead of absolute paths for files in these directories. Even better, let the user configure a search path, which is more appropriate for files that the user supplies. Even better, add some error handling that doesn’t exist today, documentation, etc, etc. None of this has materialized since PL1.
Instead, they’ve now changed the documentation and added a FAQ that completely misrepresents the current reality. The result is that we no longer know if the current reality will change since DxO is giving up entirely on compatibility, if it’s just a lazy way for them to avoid promising/fixing anything, or if it’s just poor documentation. I’ve gotten mixed messages from Support when I’ve asked.
Either way, it’s hardly a good feature to not have a robust/reliable method of moving edits between computers, or for users to communicate edits with other users.