The server is currently being attacked by a "DDOS", so if you can't get on, or odd things happen, you will know why.
Not much I can do, as these attacks are anonymous.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
Have not had any problems yet...
In mathematics, you don't understand things. You just get used to them.
I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.