pacman 7 - why is #ParallelDownloads = 5 commented by default now?

Devs, As I merged .pacnew changes for pacman.conf, I notice the parallel download option is now commented by default. I left it that way. But why is that now the default after having parallel transfer come in as a new feature a year or two ago? -- David C. Rankin, J.D.,P.E.