I have yet to update my wallet at blockchain.info. Before I do, I would like to know what does 'updating ' entail? is there an extra layer of security? Any problems? And is there any cost? Thanks.
Don't update just yet when you don't need to.If you're really concerned about the fancy UI and animations,you may.Wait for a few days until blockchain.info would auto migrate all their existing users to the new system ,they might import old addresses by default saving you some time and complications.TBH,I hate the new wallet and never had a need to migrate.