What problem is that?
99.5% of the users of this bb like it exactly as it is.
The mean age of our users is probably over 60 and many are not very computer literate.

In any case, these bb's have over 1.3 million posts. The software the other forums are using can't handle over 1m entries. In fact no windows based server can.
You have to use a self managed Unix box. That triples your costs.
CT already ground to a halt once and had to ditch a lot of the archives.
Tommy will have the same issues with PCF in a few years.

All other forum software requires you to register to post. Not so here. That is because the majority of users wanted it so.