Fusion 360 | Slots around holes 

Thank you for the generous support!

And what is the right way?

I agree, it certainly is a create way to select all those edges. I thought the real gem there was the selecting them by feature, instead of a face...that is a fantastic way to select.

Even easier and 10x more intuitive in SolidWorks

Thank you for sharing your perspective. It's understandable that you feel that way, but I believe there are valid reasons for using this technique in certain situations. While it's true that adding more outer perimeter lines can increase print time, there are cases where the added strength and stability outweigh the time factor. Additionally, hollow prints can help conserve material and reduce costs, especially when weight reduction is a priority. It's worth noting that 3D printing is a versatile technology with various applications, and different approaches may be suitable depending on the desired outcome. What may seem 'dumb' in one context could be a viable solution in another. It's always helpful to consider the specific requirements of the project and the intended use of the printed object. Constructive discussions about different techniques and approaches can lead to innovation and improved understanding. So, let's keep an open mind and continue exploring the possibilities of 3D printing. If you have any specific examples or alternative suggestions, I'd be interested in hearing them. Thanks again for sharing your thoughts. p/s: Thank you, Fusion 360 School. Appreciated.

@@ulimacha Thank you for your response. There absolutely are cases where this method is valid because of the extra strength for instance. However this is not the case you present here. I am not saying it´s always the case but most cases I have seen where people tried to save material and weight while using 3D printing, simply did it wrong coming from a CNC perspective. "...What may seem 'dumb' in one context could be a viable solution in another...." As a mechanical design engineer I absolutely agree with you, however as I have said this is not the case you have presented here. Which again coming from a CNC perspective this does make sense but not in that context. Using MSLA printing instead of FDM would however negate this issue. Since in FDM the tool path is very important but in MSLA it does not matter at all. Showing differences like this would be great I think.