coasting 

The number of threads has become so short that it is having a very bad impact on the tone and usefulness of Bike Forums.

Previously, threads became conversations with multiple participants and stayed relevant for longer and gave more people a chance to contribute, sometimes after it seemed nothing more interesting can be said. Now, a thread is a few initial participants exchanging brief initial views and then ending as it falls from the first page.

This makes Bike Forums less of a community and more of a notice board. Ultimately it makes people less likely to stick around.