Wow, this is like the third independent thread about this. The disappearing header is certainly a trend (I’d argue that it’s a somewhat thoughtless one)… but some issues as mentioned before: you miss notifications as they happen, you have no immediate frame of location reference (especially if you have multiple topics open), you have to scroll up to access basic functionality like search, etc…
Makes way more sense on mobile than desktop based on the previous conversations. I’m not sure you can sell me on the idea that removing accessible features to gain 150px of vertical space is making the experience better for anyone on a desktop machine.
What exactly does a fixed header break other than eating into the absolutely massive wealth of available screen real estate that most desktop machines have?
https://meta.discourse.org/t/auto-hide-persistent-fixed-header-on-scroll/16803
https://meta.discourse.org/t/header-takes-up-a-lot-of-real-estate-on-mobile-site-in-landscape/16658