It might keep up with Sonnet 4.5 with some tinkering.
But long story short: it seems to have better performance and similar quality for a payoff of a year or so compared to cloud models. In the same way you can self host faster/easier/cheaper than cloud hosting, if you are okay with the negatives.
I'm returning my 3090 soon for a R9700 after some more basic benchmarking, since the higher RAM should improve my observations more.