
Only an archivist, and I have it on good authority that they spend a lot of time migrating data onto newer formats before the existing ones disappear.
And, they also spend a lot of worry-time (at least) with the issue of file format. For example, while RAW files may contain all of your original data, they depend on software to read them, and that software is generally manufacturer/vendor-specific, and changes fairly rapidly over time with new camera models, etc. For this reason, TIFF, PNG, or even JPEG may be a better archival format choice for photos.