Solana suffered multiple well-documented (and excoriated) network outages in 2022 and 2021, some of which were driven by bots pummeling one corner of the blockchain simultaneously. In one such outage, in September 2021, bots crowded a token sale on exchange Raydium with more transactions than Solana could handle. Solana basically broke, going offline for 17 hours – an eon in 24/7 cryptocurrency markets.
Source: https://www.coindesk.com/tech/2023/02/24/for-solana-users-priority-fees-mean-paying-up-to-skip-the-line/?utm_medium=referral&utm_source=rss&utm_campaign=headlines