Going through some old photos, I stumbled across this gem documenting the planning in progress for what would become the input layer in 2.6. We were still in 2.5.x kernels back then. All this probably seemed like a great idea at the time.

Sometimes I question some of the design decisions we made back then, and wonder if we're really any better off.

Thankfully input has a fairly active maintainer still, so stuff continues to get regularly poked.