Fees are insanely high on ETH right now. Who'd want to pay hundreds of dollars just to swap one token to another? Whales will be the only ones that could afford such high costs, leaving the average person out of the system. It's a pity since only the rich can participate in a highly-congested blockchain network. The London hard fork (EIP-1559) had little to no effect over ETH gas fees. Things are now even worse, as gas fees reached a historical All-time-high. Uniswap is built within Ethereum, so if the network gets clogged up, fees will soar like there's no tomorrow. I wouldn't worry about high fees on Uniswap, since there are many alternatives available on the market right now. If you still want to use Uniswap, then I'd suggest you wait until ETH 2.0 is released or gas fees decline to make your move. Just my opinion