@MozartsGeist Feel free to ask your question. I don't see what there is to understand or not understand about this. The short answer to your question: Why should I invest in this new, global all-cap ETF?
I did ask, after all: here's my response to your brief answer—or rather, your counter-question: Global exposure + small-cap coverage in a single instrument;
@AxoWallStreet Chosen at random: When an All World or World + EM ETF has reached the size of the other, already full ETF.
Advantages: A simpler FIFO approach. Reduced risk of exceeding certain thresholds (e.g., exit taxation and whatever else might come up in the future) and diversification across multiple providers (and thus across multiple countries/regions where those providers are based).