Sad to say but it looks like microchannel is the way of the future.
Its cheaper & uses less gas which means its cheaper for the manufacturers.
They'll let us deal with all the problems till they get them right. They can probably make 3 of them cheaper than one copper tube & fin coil so they still come out cheaper if they have to warranty them every couple of years. They can justify going to aluminum indoor coils because of all the copper coil leaks
indoor but there has never been a problem with outdoor copper coils leaking.
There is no justification to move to aluminum microchannel except shear cost cutting.