I suggest a new option be added to the Time Control list: Hourglass.
The basic premise of Hourglass time control is: When it is a player’s turn, their time is being transferred to the opponents side, similar to an hourglass being flipped. When one of the players runs out of time they lose the game, similar to “Simple” time control.
The hourglass timer is the only mode that incentivises playing as quickly as possible without a lower bound. In a Simple timer game with 10 second rounds, a player is incentivised to wait 9 seconds before playing, there is a limited advantage to playing immediately. In an Hourglass game, speed becomes a legitimate offensive tool.
This option is practical for all game speeds: blitz,live, and even correspondence. It could also be broken into main time/X rounds of secondary time, similar to byo yomi.
EDIT: there could also be an optional lower bound, a minimum time allowed. For example both players start with 1 minute, and can “push” the other player’s time down to 10 seconds per move, which they can then push back up.