Hm, i just tried this. confusing.
If i open an assy, no arrangements exists, select a component- suppress. save and exit.
new session, open assy . that suppressed part is not loaded.
but:
If i open the same assembly , create an arrangement, select the same component suppress in the new arrangement only.
set the new arrangement to active. save and exit.
new session, open assy . that suppressed part is loaded but suppressed.
Confusing.
I use Information - part- loaded parts to see if it is loaded or not.
If not, it will state "not loaded".
Regards,
Tomas