That only helps if you don't have much free RAM. If you've got more free RAM than you need cache (including disk cache), swap only slows things down. With RAM prices these days, getting enough RAM is not worth it to avoid swap. IME on a desktop with 128GiB of RAM & Zswap I've never hit the backing store but have gone over 64GiB a few times. I wouldn't want to have pay to rebuild my desktop these days, 128GiB of ECC RAM was pricey enough in 2023!