The Stream / xUSD loss sucks, but it's absolutely not an invalidation of the modular lending model.
On the contrary, long term the only viable path is to kick counterparty and reputation risk up to the curator (fund) level.
This didn't impact Morpho's reputation at all.
Circle is not entrenched as you think.
Not too far from now platform-specific stablecoins will make up billions in deposits and generate millions in revenue for platforms.