[ashes-man]

a decent high performance carbide drill doesn't require spotting nor is it recommended

true that the drill tip doesn't start at the tip when using a 90 degree but this is brief and I've never seen this to cause a drill to wander even on deep holes , or break . Unlike carbide , hss drills are capable handling the cut . Otherwise the same thing could be said for using a center drill
If you walk through any production shop you will see that 90 degree spot drills are the most common cutters in machines these days . I've spent many years in a variety of production and jobbing shops and never seen the use or need for a different angled spot drill . It's tried tested and true and doesn't need to be over thought

I hear you. It was more a point of interest. I want only a 90 deg tool so it can be multi use.