Cloudflare just introduced MASQUE to Warp this week. You can enable it with the command warp-cli tunnel protocol set MASQUE
from terminal. If you ask Bard you will be provided the wrong command.
If you want to know why you should use MASQUE instead of wireguard I don’t have a good answer for you. From a user point of view I think it doesn’t really matter. MASQUE does have it’s advantages because it uses QUIC but for day to day I don’t think you will see any difference. I just turned it on for myself today.