I used Drop Box for this purpose for years with TWClassic.
I found being sure the sync took place in Dropbox before I shut down any computer, left work to go home was not only critical and you may find it not updated when you get to the other location, even if your wiki was not saved. So I always saved the wiki, closed the browser, checked DropBox and ideally shut down the computer (laptop) and turned it (and monitor) off at the wall. (very important on Fridays). Actually I used my own
Eco Switch to "turn it off at the wall"
Doing a shut down when ever possible does allow a fresh operating system, browser and tiddlywiki load, but you would be surprised at the kilowatts, and related "carbon" emissions that result from computers left on, and the power used by a laptop power pack even without a computer connected.
The load time was a real hassle, I know, But I replaced the HDD in both home and work PC with SSD (Which I Took when I left) and now startup is sub-minute.
However I do not use DropBox any more and I am grateful as too many times I was standing looking at my computer waiting for it to finish syncing.
Regards
Tony