It's really not reasonable at all for large non tech-driven businesses... If I were running one of those, this kind of behavior would be a strong anxiety driver for me, which would make me stick with Microsoft and their extremely lax upgrade pushes + strong backward compatibility track record. The reason is that businesses rarely have time to drop everything and upgrade something core, and it's not likely to improve their business in any meaningful way. To them, Google is just being a nuisance with this.