How much PSI do I actually need in an electric pressure washer?

Across the reviewers and specialist communities we read, the consensus is that 2000–3000 PSI covers nearly all home tasks: cars, siding, fences, decks, and driveways. Community threads (notably r/pressurewashing and r/Tools) repeatedly warn that PSI claims above ~3400 on consumer electric units are often marketing rather than measured output, and that flow rate (GPM) matters as much as PSI for how fast you finish a job.