256GB is enough for DSv4 Flash, expect maybe ~30tg/s, and a lot better profile.

I'm using Flash heavily, and I would describe it as nearly as intelligent as Sonnet-class in agentic coding, but more usable. Less world knowledge of course, and definitely a bit less intelligent; but not _that_ much.

On usability: Takes less handholding, less likely to make unsolicited refactors or whatever, and the writing style is readable.

It's not great at super-long-horizon goals as the Claude 5 models are; but if you have a good harness, you can get around that.