How is Arcade related to 32-bit?
Lots of games are 32-bit.
Re:Win32 on macOS
by Wowfunhappy on Sunday December 15, 2019 @10:31AM
(#21796660)
And just to fully complete the thought, I believe the GGP is implying "Break existing Mac games, so that people who want to play games on their Mac have to subscribe to Apple Arcade."
The obvious hardware reason on iOS is that Apple can remove support for ARM32.
The obvious business reason is to encourage subscriptions to Apple Arcade.