Similar to the issue of your brand being outdated for your company or your clients, you should take a look at your brand if you know in advance that things are about to change. One benefit of moving your brand along at the same time as you are changing your business is that you can tweak things as you go along rather than making drastic changes. You can plan subtle shifts as you slowly introduce new products or services. Another advantage is that you can see how things are resonating with your client base at a slower pace so you can make amendments as necessary rather than completely overhaul your branding in one go every few weeks because it might not be working.
One benefit of moving your brand along at the same time as you are changing your business is that you can tweak things as you go along rather than making drastic changes.