I love DT and DTTG, but if I could change one thing, it would be that currently files you open on DTTG aren’t recognised by DT as having been opened. This renders a journal in DT useless for me, because I can’t record what files I’ve been using (discussed here previously) - or why (though obviously I’d have to add that bit manually, DTTG is not a mind-reader… yet).
It’s actually rendered recording what files I’ve used via automation fairly useless generally, as most my reading is done in DTTG and I have no log of that. I use DT when I’m actually at my desk working, so it’s only logging files I later accessed in the course of writing, etc. (Don’t @ me about reading being working when you’re a knowledge worker. I know it is and I really need to not use phrasing like this, but you know what I mean! Although DT not logging what you read in DTTG just furthers that divide between input and output, for me 
) Because of this issue, and because I decided life was too short to manually record this, I’ve given up keeping a journal in DT. (I left the script running in case I ever have an emergency where I need to know what files I opened in DT on a specific date… unsurprisingly I have not looked in that folder since I abandoned the journal 
)
[This is very much a “first world problem” - I realise I’m complaining because my devices don’t magically log what I am doing for me and I’d have to do it myself 
]
I have been experimenting with interstitial journalling in NotePlan recently (sidenote: I just got that link out of DTTG, I love it when I use DT to pull a reference for a post in the DT forum). It’s quite interesting. I’ve not been doing it long enough (or consistently enough) to see if it’s actually helpful, but it’s sort of what I’d originally aimed to create in DT: a time-stamped log of what I’d interacted with, why, and any thoughts. In NotePlan, it ends up being a log of tasks I completed, or didn’t complete, with notes on what I did. It doesn’t link to any of my files outside NotePlan and is mostly a log of my time.
Anyway, I find this whole topic fascinating. I’m very keen on journalling/maintaining logs generally, and I love learning what other people do, and where their friction points are (it tells you a lot about workflows, to learn what isn’t working).