Sources? I was buying and transferring bitcoins over 8 years as I bought weed through it.
Of course you can even pay 0 but you know it's not the normal someone would wait days for the transaction going through.
You clearly did not use Bitcoin often enough otherwise you could just looked the spikes up yourself. That first corona year was even worse with the fees.
Here's some actual data you can look at: https://mempool.space/graphs/mining/block-fee-rates#all
Look at the "Min" fee rate; regularly very close to 1. That's $0.02 at current prices.