TL;DR
Most of use learn easier via doing it ourself vs seeing someone else doing or explaning.What?
I saw some factorio videos where people confess they have no clue about parameter, and then go ahead and do some difficult set ups that can be easily done via parameters, in a minute or two... Plus random mods to do x or y, when you can already do this in game via parameters...Why?
Myself included, many of use have no clue how much we can do with parameters. I read many times in game explanation, sorry, i have no clue how or what i am doing wrong. And I mean what I mean because on such occasions I even check online video, and the creator posted the blueprints, yet the blueprint, works and all, but something dosen't because the parameters don't change as I wanted.So ideea is, to give us a tutorial, where the focuse is strikly just teaching about parameter. It can be on a City block stage, where we can't touch anything and only "program" the signals. Aka similar to belt madness. The ideea of city block is because each block having different aspects. So that you are not stuck in a "let me teach you something you already know" and we can instantly focuse (via going to specific block) on what we don't get.
PS: Congrants to anyone who don't get why it's difficult to use the correct code to get a specific results. That said, can you please understand that myself and many others, don't get it. And such tutorial might be how we finally will get it. Especially if new to the game