https://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handb...
enought memory like 8GB+ you don't have to use swap at all.
...depending on usage. We have 64GB+ machines at work that regularly go swapping. It depends on various factors: how quick do you want the OOM killer to kick in, how slow do you want the system to get as a result of swapping, and how much budget is there available to buy machines that can take more memory.
Better suggestion: Be careful when listening to anyone making absolute judgments based on generalizations.
Some operating systems, just like some applications, are better for certain purposes (often because they were designed and built specifically to be suitable for those purposes). "You can do anything with anything" is a very idealistic oversimplification that's implied by the idea that no OS is ever better than any other.