Frugal

Chair might be designed frugally and frugality as a design principle might compromise on the principle of comfort. A frugal chair might even be a stool and get away with it. Frugality in design tends to be biased towards the performance of the function. Maybe this comes across as a pressure, it must seem that to be frugal one must be functional. But there are other values of frugality. There could be aspects of comfort built into an object but it might still be frugal. Frugality needn’t be opposed to comfort.

We can state that because frugality is an aspect of the spirit, and the spirit does not necessarily manifest through a lack of features.

A lack of comfort means that the end user of the object will not use it very often. This will always be opposed to the objectives of the designer. If a chair has been made, it ought to be used.