Stem-tip flowering of Euphorbia colliculina leaves little to chance, as most tips sport some false flowers for ensuring a seed set across several seasons.
Not all stem-tips in picture are in the same developmental stages. This spreads the risk, as if the plant is an accomplished statistician working cleverly towards ideal outcomes of capitalising on most of the opportunities available. Whatever goes on here happens overtly at stem-tips.
Most branches have individually been performing for some years. If you know your business, course changes are not required for optimal functioning (Frandsen, 2017; Vlok and Schutte-Vlok, 2015; iNaturalist).