On-Demand resources allows you to have a total of 20GB of assets per app, of which 2GB may be in use at one time. Downloaded resources do not get purged until the device is running out of disk space.
The 200 MB is the limit for the initial bundle, so in the worst case your binary plus the assets of a loading screen. Everything else you can on-demand load.
The advantage of the 64 GB device is that you have more room before apps start to re-download assets. In my case (1 Gbit/s fiber), I'll go for the 32GB model and count on fast downloads.
On-Demand resources allows you to have a total of 20GB of assets per app, of which 2GB may be in use at one time. Downloaded resources do not get purged until the device is running out of disk space.
The 200 MB is the limit for the initial bundle, so in the worst case your binary plus the assets of a loading screen. Everything else you can on-demand load.
The advantage of the 64 GB device is that you have more room before apps start to re-download assets. In my case (1 Gbit/s fiber), I'll go for the 32GB model and count on fast downloads.