IF the bridge is left up at 1:1 I see no reason to shut down the SCD. Just keep lowering the DC and use various other parameters to encourage migration.
We have a single CDP holder with 8.2M outstanding CDP 3088 (which has not done anything for almost a year) so I think a reasonable shutdown number provided this user doesn’t close is ~13-15M. I have expected a distinct slowdown in closures when ~35M hits and expect it will take at least 6 months to get SAI down to ~20M
My point here is that the SCD shutdown does NOT have to be a time based close but simply can be an amount of SAI or number of CDPs left to close.
The other problem here is that this 20DAI lint limit is keeping a lot of CDPs from closing but honestly I don’t think these are a ‘big’ deal.
Also I was researching a bit on the top 50-60% remaining CDP holders and all but 2 have been active in the past 60 days.
I also think a well thought out plan regarding shutdown conditions (or if a timeline which I don’t think is a good idea) should be presented to the entire community (SAI and CDP holders) so everyone has been notified in advance of the possibility of the SAI to lose it’s PEG to the dollar AND the conditions which can elicit a SCD shutdown. If the DAI-SAI bridge stays open I honestly don’t see a reason to close the SCD down or the SAI peg to be lost.
Personally I would just keep lowering the SCD-DC, match the borrow rates between the MCD/SCD or have them be slighly higher on the SCD vs. the MCD and just wait. Eventually there will be less and less SAI out there and ANY drag on the SAI peg should be driven by the markets on DAI and the available SAI-DAI 1:1 bridge.
The fact the rates should match pretty close means basically both systems are run with basically the same conditions and should not present additional headaches for the Maker community. In fact one could just put up a proposal to tie the SCD rates to the MCD ETH-A SF rates so community only needs to vote on tieing the SCD/MCD system rates, and then vote on the MCD rates in the future knowing the SCD rates will move to match automatically.
I do not see any outstanding reason to shutdown the SCD based on time but it should be on other conditions outlined above. Hence the reason I abstained.