SRS Warning Light Question

All of this talk of Airbag expiration dates…sort of re-enforces my theory that mfg’s MIGHT…make the SRS light illuminate after a certain time period or mileage mark? The other reason that I suspect this is bec of Mine and my neighbors VW’s SRS lights lit up at approx the same mileage and time… MAYBE this is a way to get the system looked (by dealer) near or around this suspected expiration date? Its not a bad theory…and I may be completely WRONG here…but doesn’t it make a little sense? What do you think?