There are apparently some misconceptions about the Polkadot protocol within the Avalanche community. Hopefully this will clear them up. They are limited to 100 parachains (assuming they actually manage 1000 nodes) You are limited to 100 parachains (and that’s assuming they manage to get 1000 nodes working on the relay chain at any decent speed). Polkadot is hoping for 1000 validators on the relay chain (good luck with that with traditional consensus - to give them more time rather than process every block they validate chains of blocks instead which adds to the latency and gives them more time for consensus). The 100 parachains isn't a hard limit but it ultimately depends on the number of validators they are able to get in the relay chain. They may hit scalability issues with just 1000 and need to reduce that, or they may be able to get a bit more than 100 parachains. Either way 100 application blockchains isn't exactly a large number.
7/29/2020