Well, for once it means resending over and over the same information on every page, it's just a waste of bandwidth. Then it makes sharding the server more compl

Well, for once it means resending over and over the same information on every page, it's just a waste of bandwidth. Then it makes sharding the server more complicated, because you need to make sure the request goes to the correct server (or you have to use a special DB just for that such as redis). For things as simple as form validation, you need to resend the values that the person entered in case the form didn't validate. Then you end up piggybacking informations from one page to another in hidden type form fields... If that doesn't sound crazy to you, then you should probably write "native" application again, it will remind you how simple life is when your client has the right to use its memory.