Rogues don’t gain proficiency with the Shadow Blade Weapon, and that I would argue that casting the spell is what gives the caster proficiency with it, so having the spell on your list doesn’t offer you proficiency with the weapon. the 2 examples you listed have in their material component “a weapon”, the spell clearly states within the line I used before that Shadow Blade may be a “weapon”, so there should be no problem to doing that. Now when it involves using it because of the material components in weapon-based spells. Theoretically, that individual to which it’s handed would still have till the top of the address use it, but that probably wouldn’t be enough time to try to so. Yes, I do know handing it over isn’t an equivalent thing, but it’s close enough thereto that I might consider it an equivalent thing mechanically. this is often supported the part that reads: “If you drop the weapon or throw it”. That you must be holding the Shadow Blade for it to stay.

Once you cast it using a spell slot of the 7th level or higher, the damage increases to 5d8. once you cast it using a 5th- or 6th-level spell slot, the damage increases to 4d8.

When you cast this spell employing a 3rd- or 4th-level spell slot, the damage increases to 3d8. Casters: Arcane Trickster, Sorcerer, Warlock, Wizard.Duration: Concentration, up to 1 minute.

Arcane trickster shadow blade