[tomhschmidt]

Really? I find the Steam app on OSX awful - super slow and unresponsive. They do this in some of their games too - DotA 2 comes to mind - and it's so obvious that's not native when you're using it.

[seanalltogether]

Oh I agree, the steam client is one of the worst pieces of software I have on my mac, but I don't think using html to layout the store is the source of their problems. The mac app store exhibits none of the issues I see with steam.

[prezjordan]

Not just OSX, it's sloppy on Windows too. I'm not sure what UI Toolkit they're using, but they should do a complete overhaul.

[Vbits]

Steam is based on Valve's own custom UI Engine, the same one used by most of their games.

[TazeTSchnitzel]

Something in-house, which they have no choice but to use because of the in-game overlay.

[kazagistar]

That's because it has to load content remotely. Any UI is shitty when trapped behind a huge network latency.