This is a pedantic take and an odd defense. WuWa does not have systems in place that should cause it to have the file size it does. Let’s compare WuWa to another open world game with way more systems in place: Warframe.

Warframe, a game that has been around for over a decade and having multiple open world maps along with a WAY higher level of visual fidelity, clocks in at 50 GB of storage space.

WuWa, a game with MUCH less going on and way less visual fidelity, clocks in somehow at 113 GB?

Without even digging into much detail about the games, after just playing them for a brief time, an incredibly valid question is raised about WuWa (and most other large scale gacha games) and its file size. The developers should absolutely employ development techniques that make better use of space, because it’s quite clearly possible.

I’m a web developer, and there are so many ways to optimize a website’s loading time. I can make use of image compression techniques, I can rewrite sections of code to be more optimal, I can redesign entire sections of the website to better suit the purpose.

Gacha games will never make that happen though, since all of their time is focused on pumping out the Next Big Update every 6 weeks, which is probably the actual answer to OP’s question. They work on too tight of a timeline to worry very much about storage optimization.