Solder-down SODIMMs?

I can get some packaging advantages using COTS SODIMMs
in a design.  Cost can be a wash with soldered-down
component memory.
Downsides of using COTS memory *modules* is they
entice users to remove/replace/upgrade/dick-with.
And, typically come with the added cost of a socket
(which is usually rated at just a handful of insertions).
Anyone tried soldering-down SODIMMs (or SIMMs/DIMMs)
in a production design?  And, doing so in a way that
doesn't forfeit the equivalent amount of real-estate?