Soldered 8GB + added 8GB vs full dual-channel: Flex mode is the likely outcomeTechnology adding-8gb adding 8gb
Single 32GB stick vs two 16GB sticks: Single stick is slower but more future-proof for most peopleHome single 32gb stick
8GB vs 16GB RAM for Roblox and Minecraft: 8GB is fine for vanilla, 16GB helps only with heavy modsHome 8gb probably enough