The old school way of setting up a drawing was to do 3 views, projected off of each other with one view sharing points and "projection lines" with the other two. In the remaining 1/4 of the page one would do an isometric view that shared no points with the rest of the page, but was a final confirmation of what you had drawn and gave a lot of information from that point of view. The whole process of design IMHO is facilitated by having to think through what it takes to put all of the features and elements down on paper and "see" them as a complete assembly in the isometric projection.
When I first started selling industrial stuff (at 23) I encountered an account where I was handed a pen and ink isometric drawing for a part under consideration, and after a few times I had to ask who the heck had time to make a full, permanent drawing on the board at-such an early stage. I was told it was freehand (note how sloppy MY freehand sketch was - you can't erase ink) and the Swedish engineer (who had recently immigrated) did this all of the time. We have been best of friends for the last half century and I have delighted in watching him design (and build) 12 airplanes with many of the details in his incredible freehand drawings. I mention this and tip my hat to THE most accomplished professional I have ever had the pleasure of knowing as he passed away 2 months ago leaving a BIG hole in our circle of friends.
Harry