Recent spamming [1][2] has seen nano ledger size balloon by nearly 50%, negatively affecting full node Initial Block Download times as well as archive node disk space requirements. The PoW requirements go up with network congestion, but at this rate of 5-8 tps are quite minimal.

[1] https://nano-faucet.org/stats/

[2] https://nanocean.org/ (Click on Live Stream)