To speed up my computer's sign-in, please allow the dropbox client to use "Delayed start"...
[...rather than cause a "high startup impact" as now shown in Windows 10's "Task Manager" on the [Startup] tab -- (for details see also the hidden columns in that tab).
I'm envisioning the same kind of "Automatic (Delayed Start)" option that windows' "Services" can be configured to use in the "Computer Management" app.]