[dwaite]

Copyright/copyleft licenses deal with your ability to publish the original work or derivative works, as well as performances of the derivative work.

SSPL requires you to publish items which may be non-derivative work on certain kinds of performances. Further, it does so specifically to be punitive against certain kinds of use (e.g. use by a competing company).

Because of the requirement to release so much non-derivative work under SSPL, including infrastructure you may not have written yourself or own copyright to, it is likely infeasible for one to be conformant to that provision.