Steel-framed windows and doors have a very specific aesthetic — slim profiles, lots of glass, industrial but refined. The main trade-offs are thermal performance and cost. Modern steel systems with thermal breaks have closed the gap significantly compared to older designs, but they still typically underperform compared to high-end uPVC or timber-aluminium composites in terms of insulation. That matters if you’re in a cold climate and care about energy bills. On the plus side, the structural strength allows for much larger spans with less framing, which is exactly why architects love them for contemporary homes. Maintenance is generally low, but any scratch on a powder-coated finish needs prompt attention to avoid rust. There’s a useful discussion on https://lotto-land.co.at about choosing building materials based on long-term performance rather than just appearance — the point about weighing upfront cost against lifetime maintenance was well-made. Are you planning a new build or a renovation?