Consumers have always been willing to pay a premium for simplicity & convenience. No difference here: devs will pay for DX.
But I suspect that you might be comparing Upstash's per-command pricing for _regional_ requests ($0.20 per 100k) to Vercel KV's? In fact, Vercel KV is multi-region, so the more apt comparison is Upstash's pricing for _global_ requests ($0.40 per 100k).