Airbnb is a great example of a terrible experience that just keeps getting worse. It makes my M1 Mac, my 32 core workstation and my top of the line android device chug.
Each booking likely represents dozens to hundreds of requests. Then, for every visit resulting in a booking there’s probably hundreds of non-booking visits.
I don't doubt that they don't prcess a lot of money - that's besides the point.
They're a cookie cutter CRUD app (that happens to process a lot of money) that takes _hundreds_ of requests and 12 seconds to load on a 32 core workstation with a gigabit fibre internet connection. They have no business writing a blog on performance engineering.