[LAU] Ardour Version Question: 2 versus 3?

[Ivan K]

I have some question regarding versions of Ardour
that people are using.

Currently, I am running Fedora 20, and their
software repository has two versions of Ardour available:

ardour-2.8.16-12.fc20
ardour-3.5.403-1.fc20

I seem to recall that in the past, despite
Ardour3 being available, some people were still preferring
to use Ardour2.  This seems to be supported by the
fact that Fedora offers both versions.

Why might one prefer Ardour2 over Ardour3?

Thanks