I stand corrected, I had noticed the more frequent docker updates and faster start times, but had not correlated the two.
I actually used the CA plugin to automate the docker updates now, since they're such a PITA to do manually (*click*, *click*, wait... *click*, next one, etc...). Everything except plex docker now auto-update once a week.
most of the LinxServer.io dockers actually "install/update" their apps on first start, or if they have not been started in a while. Or they used to, I notice I get "docker update" notices a lot now, so don't know if that's changed. I used to be able to get many of their dockers to update the contained app just be restarting it.