I am largely in the "If it is an aspect of your image train" camp with diffraction spikes, though some can get a bit excessive when you see really bright diffraction spikes that extend across half the frame, or big noticeable spikes all over the frame. To use an image of my own, this one was pushing my personal limit of spikes getting to be excessive.
https://www.astrobin.com/u6b7dg/
Artificially added spikes I am not really big on, it is rare to see ones that look "Natural". Let fracs be fracs and scopes with spider vanes be scopes with spider vanes. If you have a RASA, make your own choice on what the cabling does diffraction wise.