Can this become a slowdown problem or can i continue using it without worry?
This was your question and not that one:
My question was if it is worthy to make a Global Pivot
Some of you people are really funny...
Your posting gives the impression to me you MUST use at least 50 pivots or am I the only one who cannot read? :-P
Btw: As Smiff stated
A global pivot is a much better idea !
No further comment needed ... ;-)