The Nintendo Switch 2 will allow you to save up to 30,000 screenshots

Here's the comparison between the Switch 1 and 2:

Switch 2:
* Screenshots (System Memory) – 15,000
* Screenshots (microS Express) – 15,000
* Videos (System Memory) – 1,500
* Videos (microSD Express) – 5,000

Switch:
* Screenshots (System Memory) – 1,000
* Screenshots (microSD Express) – 10,000
* Videos (System Memory) – 100
* Videos (microSD Express) – 100