It's the open part of it that's comparable to the app store in size. The closed part is in addition. I agree there are linux-only repos that are ~1% of that si

It's the open part of it that's comparable to the app store in size. The closed part is in addition. I agree there are linux-only repos that are ~1% of that size and contain little or no malware or abuse. That's true whether you measure size in updates per day or total count of packages, so 1% seems reachable without considerable malware problems.