In my experience with the Meta Quest 2 and Quest 3, 128GB was sufficient, netting me about 60 games and apps with some storage left over. The Meta Quest 3, on the other hand, has a price of $499.99.
The Meta Quest 3S is packed with the same Snapdragon XR2 Gen 2 as the Quest 3. I've tested 13 games on the Quest 3S so far. For almost all of them, I experienced relatively fast load times ...