That is definitely not one those "pick two" situations. The relationship between those 3 things is quite different, in fact having one normally implies a better

That is definitely not one those "pick two" situations. The relationship between those 3 things is quite different, in fact having one normally implies a better than average chance of having the others. You can not release a feature until it is performant, stable and working. You just won't release a lot of features. If you have the testing and release procedures that keep things stable and working - testing for performance regressions is easier, not harder. The classic "pick 2" situations is time, cost, features. Picking any one of those makes the other two harder to do, not easier.