and savage static planning is unfun and annoying, and one of the many reasons people choose just to pf single runs, since that was made available due to cross server party finder. Not everyone can plan their time around 3-8 other people in a game, especially if the work full time or they log on at odd hours, like eu time on a NA server. If you choose to, you add a large time burden to a single event that often ends in disbanding it anyways, if one person gets tired of it, gets sick and is offline for a weekend, has to go back to school, loses their internet, has connection trouble, etc.

There's a reason why NA tend to do it all in one sitting, and that's due to those factors. Not everyone likes them, which is why pf and df exist. HoH removes that more or less entirely for the challenge floors, and previously potd kind of suffered because of it