As a general rule, I feel reasonably confident that my eTrex will have recorded a track at the end of the ride, where I'm never quite sure when I use the Strava app or similar.
On Sat I thought my etrex hadn’t recorded the first 40 mins of my audax restart ride. Then in a duh moment remembered that it archived the current track at midnight, and that I’d started before midnight to get to the start. It was all there in the previous day archived track.
As a regular (at least before 2020 happened) night rider I hated that behaviour. "Archive when full" makes more sense, except what happens is that you rarely cause the track memory to become full, so on the odd occasion
[1] it does happen you panic and think you've lost the data.
With the old HCx, you only had to care about the copy on the SD card, where it was clear that it had started a new file at midnight because of the filenames. (It was also a lot more idiot/gloves proof against accidental deletion.)
[1] Because I've turned the logging to point-per-second for track racing and then forgotten about it, usually.