[asterisk-users] Asterisk versions?

[Dave Woodfall]

Hi all,

I'm a fairly long time user of Asterisk, but I'm new to this list.  I
used to use the old forums some few years ago.

I wanted to ask why there are different Asterisk versions, as shown
by the announcements in the past week or 2:

Asterisk 13.33.0
Asterisk 16.10.0
Asterisk 17.4.0

I'm currently using 16.8.0 and wondering if I should upgrade to
16.10.0, or perhaps give 17.4.0 a try.

Are there any differences I should be aware of, like config file
syntax or similar things?

Thanks,

--
Dave