Comment by RugnirViking

to be fair, I did do exactly as you described, and im glad I had both under my belt. But the amount of bs you can get when doing exactly that, "going back and changing a previous step" can be very annoying. Changing dimensions or previous sketches is usually fine, but anything more complicated often results in everything in your stack breaking with strange errors, leading it to just be easier to re-create the model. For many of my more complex mechanisms, ive made the entire thing three or more times