It is possible that the crossgrade offer will be extended, or that it will be reintroduced at a later date. We will make final decisions on this prior to the current expiry date, which is the end of March 2017.
We have already stated that we will release a number of updates free to existing users over the coming months, and although we cannot say with certainty when we will stop releasing updates to Dorico 1.x before we start working on Dorico 2, for which a modest update fee would be payable by existing users, it is likely to be towards the middle of 2017. And of course in the meantime you will have had the benefit of all of Dorico’s existing features, so it’s not as if you have paid for software and had nothing to show for it in the meantime. Only you can decide whether Dorico represents fair value for the price we are asking for it.