When working with multiple numeric what-if parameters in Power BI, in order to control file size, there are a number of things you can do:
Limit the Range: When developing what-if parameters, ensure that the range of values is kept as limited as possible. A wide range with too many increments (like every decimal point) can drastically increase file size.
Reduce the Number of Parameters: For instance, if there are various similar what-if parameters, try to combine them or make the logic simpler instead. With fewer parameters, the file will be smaller.
Use Slicers Carefully: Slicers connected to these parameters should be used with caution. Too many active slicers can affect performance. Refrain from displaying more than the necessary slicers.
In this way, cases of asking for meaningfully incorporated what-if parameters will be handled with ease in the file size management without SCC in the Power BI report.