Based on a few posts not linking back and giving you 404’s you think the entire “Asterisk” community is dead?
That makes no sense. I believe tribox has died down and dropped using them about a year ago but there are several major distro’s running asterisk so that makes no sense.
I believe FreePBX is the better distro, some will say install your os and install asterisk, other download the iso and boot up, to each his own, but the community is far from dead and SIP trunk companies are all growing, so please don’t generalize like that.
If you are planning to move them to FreePBX do your planning and make sure you have backups and documentation of extensions, names, numbers etc just in case.
You will find FreePBX to be a solid distro.