Postfix and local mail delivery - still relevant in 2020?

[Sad Clouds <cryintothebluesky%gmail.com@localhost>]

I've been wondering - why have Postfix in the base system and why have
it enabled by default?

Most people are not interested in running their own mail server. In
this case, what is the value of having Postfix just to deliver daily(5)
reports to /var/mail/root? Seems like an overkill for something that
syslog can do perfectly well.

Is this just a vestige of 1980s time-sharing systems, when computers
were expensive and many different users had to coexist on the same
system?