I don't know when the ordinal craze is going to end. But, It reminded me of NFT (Non-Fuckible things) on ETH Network. Those Non Fuckible things often congested the network. Fuck You, who invented the system to build NFT and Shitcoins using Bitcoin Network.
Look at this list. Bunch of Garbage there https://brc-20.io/
BTW, You can see the ordinals data from here by DdmrDdmr https://dune.com/ddmrddmr/ordinals-data
It will take at least a few weeks to clear the mempool. Over 400K Unconfirmed transactions!
Rumours are that the very latest increase is not from ordinals but due to this bovine-originated-fertilizer-like BRC20 thingie..:
Behind the congestion is believed to be a surge in BRC-20 transactions in the last few days. The trading frenzy on memecoins like Pepe (PEPE) drove Bitcoin transaction fees to their highest point in two years. The PEPE token has jumped over 263% in the past 7 days, according to CoinMarketCap.
..
https://cointelegraph.com/news/binance-closes-btc-withdrawals-amid-congestion-on-the-bitcoin-network
[Edited to add cleartext link]