In every other system, when you make a large number of small changes to an object you end up with an object that is radically different than the object you started with.
This is no "jump", any more than it is surmising that if I push a ball down stairs, the ball will bounce down to the bottom.
It's observable in almost every system.
This is no "jump"...any more than it is surmising that if I push a ball up the stairs, the ball will bounce up to the top.
Evolution...the big jump--bounce---LEAP!