[ Thanks to eliteberserker for this link.
]
“Like many GNOME developers and users, I too feel that
Thunderbird is a simpler and cleaner application if you are
expecting only an email desktop client. However Evolution has its
own strengths if we view it as an office tool.“Now, jf you are a business pro you may find that Evolution has
all the necessary features to manage your contacts, calendars and
email communication in one package.“But functionality plus richness makes it a heavy app, putting
off a lot many normal users. It gets too slow and that is quite
irritating especially when you are doing email communication.”