Why does a new edition affect people who aren't going to continue with it? It means that the edition they prefer gets less and less support and is harder to find players for. Same as always. That's why lots of people who are content with the current edition tend to be wary of new editions with significant changes.
Changes that are less significant or more evolutionary tend to allow a lot more compatibility and so are easier to absorb or adapt. That's one reason I'm not too worried about any new changes coming along. If I don't like them, I'll adapt (treating some of these non-spell magical attacks as spells being a potential house rule). Though I may have to rethink my AL DMing at Gamehole Con if I don't keep up with the changes and that'll be kind of sad since they need the DMs badly.