Still true: 5 users find most of your usability problems
NN/g's classic finding — that testing with five users uncovers most usability issues — still holds and still gets ignored by teams who think they need a 'proper' sample size.
nngroup.com
daily design digest
Get the weekly emailPublished 11 July 2026 · Source dated 1 August 2024
Community discussion (Reddit r/web_design, ~2024) and Penpot's own comparison page show designers weighing Figma-to-Penpot switches on concrete criteria — performance on large files, collaboration feel, pricing — not vibes. That's a transferable method, not just tool gossip.

Coach
Write a 3-line evaluation criteria list (speed, cost, collaboration) and score Figma vs Penpot against it using one real file — keep it, you'll reuse this method for other tools.
Source: reddit.com ·
NN/g's classic finding — that testing with five users uncovers most usability issues — still holds and still gets ignored by teams who think they need a 'proper' sample size.
nngroup.com
With AI tooling dominating design chatter, it's easy to forget the cheapest, fastest usability method still works: heuristic evaluation. It costs nothing but time and catches problems before you ever test with real users.
uxdesign.cc
Nielsen's usability heuristics remain a go-to lightweight method for catching obvious UX problems before user testing, decades after they were written. It's boring, reliable, and still worth learning properly.
interaction-design.org