i understand that, however, from the commercial point of view, it is not reasonable.

say, 10 a6 comm users do not want to updte to a7. if you sell them a zero-support, not updatable a6 pro upgrade, conitec would get cash that it would not acquire as these people wouldn't upgrade to a7 but switch the engine.
cash for an old version that you would otherwise never get. sounds like a nobrainer to me.

but yes, i'm not the one making the decisions. noone can force us to update. but noone forces us to stay with acknex either.