People convince themselves that a purchase that benefits them in the present will have extended value in the future.
For example, buying the highest-end PC with the thought that it will outlive a lower-end PC to the point where the return in value is greater than the added financial cost.
Another example is buying an off-road vehicle for all the camping one plans to do in the future but only going a few times a year. At this point, buying a sedan and renting for those few trips would be much more economically sensible.
The perceived utility of a purchase now may or may not extend into the future.
A pessimist will spend to improve today.
An optimist will spend to improve the future.