Link command in terminal vs ln vs symbolic link (ln -s) differences between them?

I've learnt about aliases and symbolic links ages ago, but only recently learnt of the link command from https://apple.stackexchange.com/questions/323213/symbolic-link-vs-alias Is the link command in terminal on my MacOS - version is Sonoma 14.4.1 the same as ln or is it its own command? I've not actually done this often on terminal, but I did: touch test1.txt then edited it in a text editor with the content "Test" and then in terminal: link test1.txt test2.txt When would the link command be useful on MacOS as compared to symbolic link and alias? If you could explain - much appreciated!