Yes, but the way that I see it, if some JS function that TiddlyWiki relays on is deprecated (for example) then your Tiddly html could not work anymore, regardless of the browser. You don't have that limitation with markdown files, which are still readable in txt form.
Again, only my opinion.
Nice, old school, none of that SMD stuff :) Very nice case you made too, I like the idea of using off the shelf cast boxes and then making them look super nice.
On holiday I stopped drinking coffee. Then for about one week the muscles in my back hurt so much I could not sleep without pain killers. After that week, no problem anymore. This is repeatable, every holiday same symptom.
B.t.w. drinking just one cup of coffee per day breaks this symptom almost immediately. And drinking tea does not help at all.
Maybe I should add I drink coffee since very young.