Well ... depending on the usecase it _is_ a waste of money. Libreoffice, Gimp and Inkscape are perfectly viable alternatives to MS and Adobe products if you are a casual user.
That said, I don't believe anybody who has used the 'real' office/photoshop/etc is easily able to go back to a 'lesser' alternative, but that's mostly due to sunken cost and lock in ... but, I don't think a casual user will make good use of the better features in the better software.
That said, I don't believe anybody who has used the 'real' office/photoshop/etc is easily able to go back to a 'lesser' alternative, but that's mostly due to sunken cost and lock in ... but, I don't think a casual user will make good use of the better features in the better software.