ok, so there are certain functions that keep rising forever but are still bounded above. So what I mean is that physical extensive quantities are all bounded a

ok, so there are certain functions that keep rising forever but are still bounded above. So what I mean is that physical extensive quantities are all bounded above. Black holes will run out of matter, and there is only so much accelerant in the universe. Like you said. Conductivity is not an extensive physical quantity like mass or energy.