The problem with the word 'Acorn' is that, in educational circles, it has long been firmly connected with infant and primary schools. Any company wanting to sell computers to secondary schools and Universities is not giving its products the image boost it could by branding itself 'Acorn'.
It's saying 'I'm a childs computer'.
We're well rid of the name.
If another company has decided to repeat a mistake around 25 years ago, then more fool them.