Not him, but I used TW extensively. The problem was the entire wiki is in one HTML file (which is impressive), but it did not scale with additional image tiddlers. At some point it would just not load. There is a separate NodeJS hosted version which I ran for a year, but it had memory issues. (Again, probably tied to the number of images). I totally get it's mainly for notes, but I'm lazy and sometimes I paste snippets from papers rather than rewrite them, so it balloons easily.
I solve that issue by putting all my images in a folder and referencing them with a filepath. Not quite as portable as a single html file containing images but as somebody not planning to regularly send it to friends it gives a lot of flexibility to alter and change images easily, just add to the folder and reference.
It's fantastic software, though!