My NIB 617 has its own plastic box, so does that matter?
Just sayin’
In 20, 30, 40, 50 + years it might. Possibly even sooner. But, tis only money.
I never took care of the boxes or made any special attempt to preserve them, either, for decades. Then I see people who are collecting, and who pay more for the same thing if it has the (or a) proper box.
If resale value is ever on your list there are people who will pay more for a more complete package than they will for just the gun alone. The older and less common the gun gets, the more the box and papers and accessories are worth.
No matter if the gun is heavily used, the closer it is to the way it left the factory, the more a collector will pay. And, its also about rarity. The box and especially the manual and other paper and any tools frequently get separated from the gun and lost, so having those all together with the gun adds to the value because its rare.
One of my pistols, just having the original factory manual added $125 to the value and that was over 20 years ago, so i imagine its more than that, today.
Collectors are funny people, I know, I are one, about some things...