Fair point! I just did many installs recently (a bit of a long story), and at some point just stopped even following the wiki. But if I can afford it, I simply clone my entire system, and tweak from there. Takes very little time, and I have a complete clone of my perfectly working system.
Also, theoretically, I don’t even need a backup of the system, if I have at least two laptops with mostly same system. I have, one at home with broken keyboard and no battery, which servers as my home computer connected to a display. And another one is for on the go.