Until TLG is out of business which- after an incredible re-tooling and new vision in the 2000's- will likely never happen, the modular line will continue to grow, expand, and draw more adult fans (buyers).
This means that modulars are still in their infancy as a "set".
The Town Hall is, up to this point, the most expensive/highest piece-count of the modular line.
Lessons learned possibly by TLG:
Folks are comfortable in the $150-$160 range, but $200 is a rather large bite. Thus, the slower sales- and unexpected departure- of the Town Hall.
It is reasonable to speculate that, ten, twelve, fifteen years from now, when we are that many modulars down the road, we will see more amazing sets- but likely none that reach this purchase price or piece-count. TLG may likely consider a $200 modular set a slap-on-the-hand from buyers.
Any die-hard fan will consider this a "must"; the largest, most expensive mod ever produced. And one that the majority of the investment community missed, due to the surprising departure it received.
Hold.
Hold, hold, hold, hold, hold.
There are many, many thousands of future modular collectors (on top of the current ones) who don't know anything about this set, or even the line in general. They are coming; Lego is only growing in popularity and likely will continue to do so.
Once they discover the Lego modular line, do some research, and determine what's out there... the TH may well become the centerpiece of any true collector's display.