Synthesized answer
The provided passages do not contain information about the practical implications of abstract objects. The text only offers the title, category, and page count of a work on abstract objects [1]. Therefore, I cannot answer your question about practical implications.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: An Introduction to a Theory of Abstract Objects by Edward N. Zalta Categories: Logic, Symbolic and mathematical Pages: 220