There are tremendous forces applied to the Lugers toggle assembly when fired.
Over time this can lead to cracks forming on toggle joints, springs, breech blocks, firing pins etc.
So in a well used Luger, particularly during wars toggle, extractor and spring replacements were common ... not so much a concern in a weekend shooter but it still happens.
Again just my humble opinion.
Be safe and have fun.
P.S. - thanks for not shooting me