Were you just happy to have learned how #proj #proj4 strings work? Well, sod you, b/c they won't be supported much longer, it seems: "PROJ strings can be lossy for storing CRS information. If you can avoid it, it is best to not use them. Additionally, PROJ strings will likely not be supported in future major version of PROJ for storing CRS information.
More info: https://proj.org/faq.html#what-is-the-best-format-for-describing-coordinate-reference-systems"


