If it is a default setting, can it be changed? The max.-3-answers rule stops users to give a continuous update to a certain topic, like here. The result is a second topic with the same content which does not really make sense and is against the general rules. The only workaround would be to open a second user account to continue after the 3rd post which is not encouraged for this forum.
As there are very very few topics affected by the problem of more than 3 consecutive replies anyhow it would make sense to skip this default setting (if possible) and just observe if any problems arise in future. There was no such restriction in the old forum and it worked well for many years so why shouldn’t it do here?