I also pointed this out in the other thread, but VW is currently building up a direct competitor to Rivian. VW themselves says they want the investment for the Software of Rivian, which also is somewhat curious.
VW has had large problems getting their software processes straight. They've thrown money at the problem for years (instead of changing company culture, which needs to happen first) so I'm not surprised they'd buy a whole car company just for the software.
I don't think that is true at all. They even tried to create a separate company, just to focus on software, so that culture there could develop differently. It just didn't work out.