First, what you makes you think the "next version" is going to be out next year? It's been 5 years since the last version. The one before that had a 3 year gap. The one before that had a 4 year gap.
Second, any changes in the coming year are going to mostly efficiency and security patches. So what used to be free now requires a paid subscription. This is not in any way a good thing for consumers.
They have already announced that change. Office gets updated yearly on both Mac and Windows.
Also not true. You have zero way of knowing what their future plans are, beyond what they have announced and you somehow missed.