Perhaps I'm being stupid

In GW 7 you had two choices:

View attachment, or open (basically)

View used the Stellant/Oracle Viewers
Open used pretty much whatever Windows associated the file type with.

PDF has always been an issue as the Stellant Viewers render either incomprehensible or like 2 point font size.

In version 8.0.1 you can select Adobe Acrobat as your Viewer.

However, if you click "View" you still get the Stellant Viewers, but "open" uses Adobe.

I fail to see any difference between that in version 8 and the "open" in version 7.

Am I missing something?