Given the complexity of the electronic systems, they aren't hedging strategies as much as they are faint-hope clauses.

MS supports their operating systems for seven years. Consider that BMW typically has a multi-year development cycle, followed by a seven year model run. People buy that product part way through its life (ie, 5 years from initial design) and then hope to run it for 10 years, which makes 15 years from inception. That is twice what MS can manage, and they are in the computer business.

Then people complain because BMW can't find a way to keep updating their 15 year old navigation system.

__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue