I see why it can be confusing. The funny thing is that you can edit posts, but you can't save them on the server. In fact, you can save a local copy of a site built with TW, but it becomes your own copy. You can go to the settings and hide the save button. Not sure if you can totally disable it thou.
What I like about this model vs. others is that it's entirely self-contained in a single file. As long as you have a browser that supports Javascript, you can work with it. And as much as I like modern tools like Obsidian, TW pretty much guarantees me that if I save 1,000 tiddlers on a file (up to 100K are known to be possible), 20-30 years from now, as long as HTML and Javascript are still capable of being ran somewhere, my entire knowledge base will be there.
Heck, other than some Unicode issues I have, my entire site is happily in archive.org as a single, snappy file right now...
What I like about this model vs. others is that it's entirely self-contained in a single file. As long as you have a browser that supports Javascript, you can work with it. And as much as I like modern tools like Obsidian, TW pretty much guarantees me that if I save 1,000 tiddlers on a file (up to 100K are known to be possible), 20-30 years from now, as long as HTML and Javascript are still capable of being ran somewhere, my entire knowledge base will be there.
Heck, other than some Unicode issues I have, my entire site is happily in archive.org as a single, snappy file right now...