funny, even though we've got so much more nowadays, it just doesn't seem as much fun as it used to be...
That's because an experience adds an absolute amount of experience, not a relative amount.
If you have no experience then:
[exp]
is full experience-boost, 100%
If you have experience then:
[previous experience ][exp]
is just a minor relative addition. This relative minor addition is what we experience as 'absolute' tho.. that's the whole thing about it.