Not only will this save time, but you can also see steps you have done between where you are undoing to current. I just redid a thing with a thousand CTRL Z's (exaggeration but felt like it haha), and it undid a layer I had implemented. I just noticed it a little later. Thankfully, this was an easy redo, but I did forget about it and had no way of seeing it in history... unless I went to edit->undo "[action]" every single time. This also goes along with the whole reason for the history window - time is money!
Not only will this save time, but you can also see steps you have done between where you are undoing to current. I just redid a thing with a thousand CTRL Z's (exaggeration but felt like it haha), and it undid a layer I had implemented. I just noticed it a little later. Thankfully, this was an easy redo, but I did forget about it and had no way of seeing it in history... unless I went to edit->undo "[action]" every single time. This also goes along with the whole reason for the history window - time is money!