Because Amiga IS better than a Mac, and a new "Mac" is NOT a Mac because of Intel chips. If hardware can be completely different and name remain the same, then the Commodore PC (especially an upgraded one) can be relabeled as an Amiga as well, right? They are just using the name to draw loyal fans and for marketing purposes. I would state that if the hardware is backward compatible, then you can use the same name.
That's stupid. Seems like you are against evolution to me...
And you cannot accept your old Amiga solution sucks and isn't the way to go anymore. This was good 20 years ago though... As good as the Ford produced 20 years ago was probably good. But the Ford produced today isn't backward compatible with the old one... And Amiga of today... Wait! there's no Amiga of today. The Amiga hasn't evolved since 20 years. But maybe it's still better than anything... Or maybe it's not...
Well, if Motorola kept advancing their processors and keeping them backward compatible, you could have had a more powerful Amiga more easily today.
Maybe they didn't because it was hard and useless ? maybe the 68k wasn't perfect and there was a better way to design processors ?