I've been using TiddlyDrive at work on a daily basis for the last six months (TW5 v5.1.20 to 5.1.22) as we use drive as a file repository and it is really helpfull.
I find everybody at work wasting time waiting for search docs to be found on a slow wifi, while I have all my links nicely organized on my TiddlyDrive notebook.
I really recommend TiddlyDrive in this and probably many situations.
I find the Create wikitext link - (crtl-L) button in the EditToolbar, does not insert the link it should, while this feature works properly and is very useful working on TW5 online and offline, on the 3 TW5 versions mentioned.
Just in case any TiddlyDrive maintainer can have a look.