When new gear gets added to the game. *cough* rumored DLC *cough* (never had beta, so NDA... umm doesnt apply) will most likely result in these forums being flooded with posts asking for more space.
But as the game is currently. There is no need for extra space at all. If you are running out of space it is cause you are hoarding items.
i have never ran out of space in DA:I and gotten the message that I need to salvage items.
If there was a way to track a players item manifest, I would most likely have obtained 90-95% of the items. I have only kept lvl 18+ purples or even some blues on rare occasion they might have a great proc on them.
my gear
-40 weapons, not counting the default items you cant salvage. All of which are 18+. 9 of the 40 are blue lvl 18+ the other 31 are purple 18+. No duplicates of any weapon except dragon daggers. Only missing 7 or so weapons, sulevin, PBM, CR bow, emperor shield, everlasting shield, and the 2 decent/good maces
-160 armors crafted, Every armor crafted for the base 12 characters. 3 armors for each of the 3 newest characters.
-75 accessories. 46 of which are abilty rings. Missing crit dmg rings and 2x 10% HoK rings (currently only have 1 5% HoK ring) Only ablity ring I believe I am missing is a stonefist ring if such a thing exists. 1 of each purple belt, 1 of each purple amulet.
-22 arm and leg upgrades - each armor crafted with the exception of 1 has an arm and leg upgrade in the armor.
- 12 superb runes, 3 of each type,
If the limit is truly 500 items max. I still have 175+ slots available. I dont see the need for any more inventory space for the life of DAMP
Only way to even hit the cap is if you have saved every single weapon you have ever came accross. Only salvaging the duplicates. And/or you are sitting on 100+ of the upgrades. If you have a silver and blue accessory that corresponds with a purple version. I highly suggest you salvage the lower tier gear. Unless you equip low tier gear to challenge yourself when you play.
I cant tell you how many times I have salvaged an audacity before Izzy came out. Was lucky enough to find one last week in a treasure room during a run.