You're talking about different kinds of timelines. It has an animation timeline, you know, for keyframes and stuff. What that other person wants is a timeline for non-destructive edits, like in most CAD programs, where you stack "edit operations". Difficult to explain if you've not used CAD before.
People often shit on the cheap Creality printers, and sure, the quality control is not great (and don't expect any customer support), but I'm having significantly fewer problems with my Ender 3 V2 at home than we are at work with our Snapmaker 2.0 A350 (costs about 5-10 times at much).
I've had my V2 for a few years, and after getting a textured PEI spring steel build plate and changing the bed springs, it's been super reliable and consistent. No other upgrades needed so far.
Incidentally, I have Pump Six and Other Stories by Paolo Bacigalupi on my reading list. I've heard good things.