I know for a fact at least 60% of them are real - they occur while I'm around. I've had to reset since lights stop going on off and alexa says 'device not responding'.
Since I took this graph I've enjoyed 2 days of no crashes. I have been disabling apps a few at a time to see if any impact. I disabled Hub Information and ECC (power monitoring) and I've been stable for 2 days - so. for now I'm leaving it just exactly as it is until/if next crash. it may have been as simple as an app problem all along. It doesn't account for numerous other issues found - like the dhcp problem the dns problem etc. but those are overcome now.
So. we'll see. my point of the post was not really to highlight my crashes, it was to point out sometimes there are other methods to capture data.
Here's todays' 7 day graph