So to go back to my comment earlier. Chromia's main value proposition isn't a bridge between blockchains, but that is one of the potential use cases, as they have bridge with Ethereum already.
In my eyes the main value propositions of Chromia are
Scaling throughput - Chromia offers theoretically infinite horizontal scaling with multiple side chains in tandem
Speed - blocktimes in Chromia are under 2 seconds and can be optimized to be even faster over time.
Relational database querying - Chromia is a Relational Blockchain, the first of it's kind. With the internet and software over time there was a big shift to Relational Databases with around 95% of the internet involving some form or another of relational DBs. The Chromia team saw that the blockchain industry was missing this key infrastructure piece, so they built Chromia to emulate that efficiency. This is absolutely crucial to certain applications.
Lightweight powerful programming language designed to be able to build the above mentioned relational databases, and be easy for any programmer with basic experience to start programming right away with minimal lines of code for maximal impact. This matters... imagine being able to code what would take 250 lines of code in other languages, in just 50 lines of code. (These are not specific numbers, just made up numbers, but the devs in Chromia can probably explain more about this and they've done some examples of this at hackathons, like one I attended in New York at consensus :) )
I can't stress 4 enough, many old programming languages die over time and give birth to new more efficient, error resistant languages, which is especially important in blockchain, because as we all know, if you make a mistake in one line of code in a smart. contract it can end in losses of hundreds of millions of dollars like has happened many times (E.g. The Dao hack)
Rell is a next generation language built for Relational Blockchains.
- Flexibility - Dapps are first class citizens on Chromia - dapp developers can write all sorts of rules regarding how fees are paid, what their revenue model is, how many chains and what chains they want to utilize for different benefits depending on their needs.
For example a developer can create 1. A dapp where the users pay all fees 2. Freemium model where the dapp pays the fees, but users can select premium benefits like special skins, equipment, weapons, or can have access to certain VIP type areas of cities. 3. or maybe higher interest rates on a loan as a premium member of a peer 2 peer DeFi lending platform. The lender or borrower can lock their tokens for an extended period for fee free transactions on the side-chain
- In a gambling platform users can receive VIP treatment for gambling past a certain threshold, similar to benefits that hotels and casinos give big spenders in Vegas
The possibilities are really interesting, and I'm sure over time Chromia community and devs will come up with all kinds of new ideas for this.
They also have flexibility of having accounts, sub accounts, and a bunch of other cool features. The team has thought of all the pain points of other blockchains and are solving a lot of them in very unique and novel ways. I personally think Chromia is one of the most unique approaches to blockchain that there is in the space.
- Game updates allowed through automated soft forks. Rules are not necessarily locked in place requiring hard forks, the team has created a new type of system that allows for more flexible fork changes if the community agrees to it so that games, dapps, DeFi, and other protocols can evolve quickly instead of being stuck like many blockchains - my personal note on this, for something like money - aka Bitcoin, you don't want changes, you want that "dapp" to stay consistent, but in some situations like a game that's rapidly evolving, you want the ability to open it up to more agile and dynamic movements in code.
These are just the value propositions I like most about Chromia, there are many more!