The reason that the current version is stuck there is that I made an unwise choice years ago, and created a filter called “omrs.display”. Code here. Unfortunately in the next Angular version it no longer works to have a filter with a dot in its name (which was a dumb idea in the first place.
I’d support renaming this filter to “omrs-display” (and then upgrading angular), but someone will have to do the legwork of doing the communications around this, and helping code-heavy implementations that contribute to uicommons (e.g. PIH) to make the necessary changes on their end.
So far nobody has prioritized doing that, and nobody has really complained about the existing old angular version. (Except of course for Angular 1.x vs 2.x, but that’s a different topic!)