I think many people who dislike Pro Tools actually dislike the company AVID. This was the company that mistreated the Sibelius team a few years back. They wanted a cheaper operation so sacked a brilliant specialist notation team which was immediately snapped by Steinberg. They are now the team developing Dorico which is aiming to be the top notation program. Since that time Sibelius has pretty well stood still with hardly any real development so you can imagine that many Sibelius users have a pretty low opinion about AVID.

In addition AVID's overall profitability looks pretty shaky and so I would not bank on the long term viability of the company