BTW this room is now almost 1000 days old.

I am not sure to which extent it was useful. The room info shows about 1.2k messages posted in this room, which is only slightly about 1 message per day.

But I still thing that it might be useful to have room for this topic - considering that calculus is among the things which are most frequently asked on the site. (Currently the two most popular tags are calculus and real-analysis, both around 60k questions. Even taking into account that lot of them might be mistagged, it seems that calculus and analysis belong to the most frequent topics on the site.)