Still have 2018.50.6

[GlenM]

I did a restart of my system and the update appeared soon after.

There's actually more in the update than what's listed in the Release Notes. Sentry Mode, and Blindspot warning is also there. See this video by Mother Frunker:

 

[Rchan88]

Got the software 5.15 update this morning.

 

[Xevex]

It’s just dog mode and automatic folding mirrors in a specified spot(forgot what it’s called) and that’s it

I can confirm that I got a sentry mode too.