The Start Menu is now assumed knowledge that the furthest left icon on the taskbar is "special" and does something different to all the other shortcuts. I guess the modern equivalent of "Start" is "Type here to search" in the Cortana bar but that's not a great experience for new users. We all know the propensity for it to decide to search Bing at the slightest provocation but if you try some natural "never used a computer before" things like searching for "power off" or "shut down" you get some quite unhelpful results. (The former wants me to set up a power plan, the latter directs me to Add or Remove Programs)
It feels like computer use is assumed knowledge in 2019 - that everyone who buys a computer already knows what the Windows logo represents, how minimising and overlapping works, what the difference between an app icon and a notification tray icon is, and so on. Microsoft no longer feel the need to design so much for people buying their first ever family computer, having never even used one before. Probably true in the first world, but I wonder if this holds out globally?