I was happy to see that MS increased the per-file size limit for a SPO library from 2GB to 15GB. However, it seems that uploading data using anything other than the browser is still hampered by this limitation.
I was first noticing this a few months ago when performing a local share migration using the collection of 'SPOMigration' cmdlets from Microsoft; any source file exceeding 2GB was ignored. I figured it was just that the module had some hard-coded threshold and it would be updated eventually.
However, I just tried using the fancy new 'SharePoint Migration Tool' (also official from MS) and noticed it was doing exactly the same thing. It skips anything over 2GB. The logs say
"Scan File Failure:File size exceeds limit".
Has anyone else noticed this and, more importantly, is it documented somewhere? My clients are asking why they are paying me to do bulk migrations for them, if they end up having to then go back to the browser anyway and manually upload the biggest ones themselves.