If the ODA would announce ARCHICAD PLN support this may be more significant for ARCHICAD users. RVT file format support (2017 only at the moment) is a huge undertaking but one that also confirms "de-facto" standards which Revit has become.
While I think it it is good for users to have more ways to access their data, even without the native software, theres isn't much you can do with Revit native data as such. They are organised completely different than e.g. ARCHICAD Elements or Vectorworks or any other software for that matter.
With DWG support, a line is still a line and an arc, polyline and text can be reasonably translated into other systems. But the way Revit defines e.g. a slab or a wall is different from ARCHICAD and others. So not sure how far they'll get in having full access.
OTOH, if some owner enforces delivery of native RVT content (which they shouldn't, but somehow some organisation seem to do), then other users may finally be able to deliver. Although it'll take a while to have fully validated RVT models according to a specific template when coming from other software.
So yes... HUGE but with lots of considerations.
--- stefan boeykens --- bim-expert-architect-engineer-musician ---
Archicad27/Revit2023/Rhino8/Unity/Solibri/Zoom
MBP2023:14"M2MAX/Sonoma+Win11
Archicad-user since 1998
my Archicad Book