Why is MuseScore not a 'professional' program?
From the MuseScore home page:
"MuseScore is a free cross-platform WYSIWYG music notation program, that offers a cost-effective alternative to professional programs such as Sibelius and Finale."
First, a detail of punctuation: the comma in that sentence doesn't belong there unless you change 'that' to 'which' (in which case the meaning would be altered subtly). (This is a grammatical issue of restrictive vs. non-restrictive relative clauses.)
But -- of more importance -- what defines 'professional program' in this context? Even if MuseScore's feature set isn't fully competitive with those of Finale and Sibelius, isn't the critical difference that they cost big bucks while MuseScore is free? For a product to describe itself (even by implication) as not professional isn't exactly a ringing endorsement -- so wouldn't 'commercial' be a better word choice than 'professional'?
(I'm also thinking that 'cost-effective' doesn't precisely describe a product that has no cost at all -- but I believe that the substitution of 'commercial' for 'professional' is a much bigger priority to consider.)