@Suhas Tambe
My view is that, if purusas are many, there must be something to distinguish one from another. If we accept that purusa is fundamentally different from material nature, then they cannot be distinguished on the basis of any material characteristic. But we have the idea that there are some purusas who have become established in their true nature and others who have not. It does not seem reasonable that an individual purusa would go through eons of evolution, only to lose his individuality in the end. There are several arguments for the individuality of the purusa. I will leave you with just one. If the purusa is one, then if one attains kaivalya, then all must attain kaivalya, because the purusa cannot be both free and bound.