If you will look at it objectively, the Cosmos ecosystem is the next biggest after Ethereum in terms of adoption and usage, not Solana or Avalanche or Cardano.

BNB, ATOM, CRO, INJ, TIA, SEI, DYDX, KAVA, AXL, OKT, RUNE, OSMO, KUJI, AKASH, JUNO, XPRT, LUNA, SCRT, FET, STRD.

Next to Cosmos is the Polkadot or Substrate ecosystem.

DOT, MOVR, AZERO, ASTR, KSM, GLMR, EWT, ENJ, ACA, KAR, PHA, LINA, KILT, OM, SDN, BNC, XOR, CAPS, CQT, LIT.

Solana and Cardano are monolithic blockchains (at their current state) while Cosmos and Polkadot are polylithic.

Polylithic blockchains have multiple chains connected to a core chain and form a network of networks. Each chain can communicate (interoperability) and support each other (shared security).