Care about this when it shortens the job you are doing repeatedly. Tool value rises when gathering, clearing, building, fishing, or repair work is taking more time than the next unlock would save.
Practical Use
Repair Kit should be used when it directly improves the current route. Put it near related storage and workstations so the benefit shows up every day, not only when you remember where it is.
Related Strategy
For tool planning, upgrade after the job becomes repetitive. Better durability and speed matter most when the route includes repeated mining, chopping, tilling, building, fishing, or repair work.
Common Mistakes
Do not craft or upgrade Repair Kit before the related job is actually slowing you down.
Do not carry every tool on every trip if inventory space is the bottleneck; pack for the material or task target.
Do not forget that better tools are route upgrades too: faster gathering matters most when storage and crafting are ready to use the result.