Our work is simply road building. We do things that others will benefit from in the future.
If you improve the current road, you are sustaining and preserving for a new generation. You are giving others opportunities to succeed and drive innovation forward.
If you build new roads, you are giving others the freedom to explore and create off that road. They may extend your road or create their own.
The previous generations won't know the effort you've gone into building your road. The satisfaction of a job well done is the reward.