Really, I don't get why they just can't keep on doing incremental updates to the machines they have. I am still using a Macbook Air 2012. I am actually waiting

Really, I don't get why they just can't keep on doing incremental updates to the machines they have. I am still using a Macbook Air 2012. I am actually waiting for the successor to come out. This machine with 8GB and 512GB SSD is fine as it is. It might be boring but from what I know it is also what the majority of developers (or other users) want or need. Maybe NVM if there has to be some innovation. And maybe put some effort into keeping (or improving) the build quality. Can't be so hard. Oh, and fix the damn power supply cables for that matter (Magsafe is great but what about those cables)!