Why don't we see more game types based on number of kills?
As title says. Nothing wrong with having the nexus as a game objective, but is there a particular reason - a different set of balance issues perhaps - that makes it problematic to develop game types based on total number of team kills? This could be first team to reach a certain threshold, or most kills within a certain time span.
(I've only been into League for just over a year, so I may be unaware of past game modes that included this.)