Dumb question - Volumetric lighting on my old AMD k6-II 3D

I fondly remember way back in about 1997-8? the software Caligari Truespace, and used to play around with it on my very old AMD K62 computer, using my Diamond viper 8mb??? Open GL graphics card. I even had a 3DFX voodoo2 12mb card in my machine at that time that would work with TrueSpace as well.

Question why was it that TrueSpace could handle volumentric lights and cast down volumetric rays as easy as say running a spreadsheet relative to Blender where it seems to be a brand new thing with cycles???

I’ve even seen people having to cheat making the volumetric lights by using primitives like cones and giving them a volumetric material. I i know Blender is capable of a lamp doing what i said, as i came across it in a tutorial on youtube here https://www.youtube.com/watch?v=PGYACiNGM9Q But just want to know why it seemed effortless for software that is more than 15 years old… Some very old images http://members.home.nl/rouweler/colatruckD1_c1.jpg

It used to have a feature call radiostisity as well, where it would try and calculate a sort of global illumination for the scene and it would take ages to calculate and never quite reach 100%. Whatever happened to that feature?

Cycles is path tracer and it is Unbiased renderer.
This what you are showing is biased or in other words faked/aproximated.

And Radiosity not ‘radiostisity’.