Please consider the continuation of perpetual licenses to be upgraded indefinitely. As long as the owner continues to pay each successive year of course. When they stop paying they retire the license at the version they stop paying at and it still continues to functions for them indefinitely.
Please keep timed subscriptions for those who want and need them in their particular business models.
You cannot be any fairer than that and you also keep all customers very happy and engaged with Graphisoft products.
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