Tasks that are slogs will be given up on more easily.

A slog is a pain in the butt all the way until you reach the payoff.

Sometimes the payoff might be very far in the future.

If it's a slog, you'll likely only keep with it if the reward is very good, or there's some coercive force keeping you going.

E.g. it's a task your employer requires you to do.

But some tasks cause joy as you do them.

The action of them is a reward in and of itself.

Learning to code is a slog.

But some people find the act of programming to be joyful; solving little logic puzzles, and then at some point achieving the payoff of making something that does what you want it to.

But if you don't find the joy in the act of programming, you'll likely give up on trying to learn it before you reach any payoff.