A few points:
Deploy ‘what’ on xDAI - governance or Maker Vaults, liquidations, etc.?
I think the ‘Why not’ points are mostly made up.
DPOS is the only difference that i can tell. Less nodes maybe less security but would rather experts speak to this.
This is decidedly NOT true. xDAI is in use now and NOT a testing ground. It is also rapidly becoming a L2 hub location with bridges not just to Main net, but soon Matic (March latest), and shortly there after Binance Chain.
No clue what this means. Chainlink is also soon going to be release on xDAI so we will have chainlink pricing oracles (namely for agaave).
These are just made up points. If you think playing with people’s money on xDAI then you could make the same points of Ethereum…
It isn’t just a risk issue but a usability one. Dust approaching levels that basically make existing small vault liquidations cost too much. High Main net fees are pretty much pricing the people Maker wanted to serve (the underserved) out of the market.
Here is a valid point. Technically how would Maker Mint DAI for xDAI chain because you can’t just mint DAI on xDAI. You have to basically mint DAI on mainnet and bridge it in. But I expect this is easily surmountable by taking part of the surplus and bridging it into xDAI for use by a Maker fork.
I think if there was a real point its that a better L2 probably will show up (optimistic) and it might be prudent to wait for that. I know a lot of development is lining up for optimistic but I also know a lot of L2s are going now (Matic, Binance, xDAI) and xDAI is focused on bridging as well as becoming a L2 hub.
Maker can sit and wait and hope main net fees come down or they can decide now to put up an instance somewhere. Since xDAI is EVM compatible porting should be easiest on xDAI than any other L2. Development is the primary hitch here and Agave will be released soon on xDAI (everything is ready to go we just need the reliable oracle hooks).
Either way DeFI will make it to L2, the real question is whether or when Maker will move there.
You also ignore another important point. Since the token that powers transaction on xDAI is DAI basically fees will always be denominated with tokens that have a fixed value. 100gwei on xDAI is vastly different in cost than 100gwei on ETH.