Limited supply: lots of things have this, including gold for instance; you don't need blockchain to do this digitally.
Might sound like a funny question, but how do you really know that gold is limited? You don't really know. You're guessing. There may be asteroids in outer space, full of gold, waiting to be found by the human species.
For all practical purposes, the supply of gold is well known, as it the growth of gold discovery.
It's true that there's some chance that a giant asteroid could hit the earth made out of pure gold, but we'd all be dead if that happened anyhow.
You clearly have overlooked "trustless". There is no money system in the world with verifiable supply in a trustless manner, apart from Bitcoin. And, as I've already said, gold's supply isn't verifiable. In fact, no money supply is verifiable, apart from Bitcoin, trustless or not.
What exactly do you mean by "trustless"? 
In the case of Bitcoin, you are trusting a set of miners to faithfully execute the software. It's a good system with good trust, but it is not "trustless" in that sense.
But please, try to define your terms in 
benefits to the end-consumer rather than abstract ideas--that might make it easier to understand.
Transactional finality: all transactional systems do this (?)
Transaction finality, in general? Yes. Transaction finality in a 
trustless manner? Only blockchain systems, and physical cash.
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Again, what does "finality" mean in this context? Again, define in terms of benefits to end-users.
Divided possession in a trustless manner: physical cash does this; you don't need blockchain to do this digitally.
You probably don't know, then, the meaning of the word "trustless". There is no mechanism which can provide both of us divided possession of cash in a trustless manner. We either need to trust each other that we will keep our word, or use a lawyer during the transaction process. With Bitcoin, we can create a multi-sig address, fund it, and when you want to make a transaction, you'll have to take my permission, otherwise 
the funds don't move. 
Again, what are you talking about here? I can guess at a few things, but maybe you can clarify instead? Why is this thing you are describing "good" for people? What benefit does it give them?