Why mergersf+snapraid are relatively obscure and unknown compared to Truenas?
I’m talking about private, hobbyist use. These tools don’t require all drives to spin constantly, which saves electricity, reduces heat, and minimizes long-term wear. You can add new drives at any time, and you don’t need a UPS or ECC RAM. Even if something goes wrong, at worst, you only lose a single file or drive rather than the entire pool.