What is considered as the break even point for your Xenforo community to shift from shared host to VPS to Dedicated server set up.
What is the criteria like, max thread and post count, max number of visitors online, database size and any other factors that contribute to the kick from your current set up.
Some of the points given by other members:
#When the site gets slower, as complained by users
#Host not able to fulfill certain requirements of the forum, like geoip provision
#Power of having full control