There's no doubt that ETH will eventually solve the "high gas fee" problem. My biggest concern is ETH's disregard towards decentralization. Its scaling tactics are making it more centralized than ever. First it was the PoS upgrade, and now it's going to be the increase of the staking collateral from 32 ETH to 2048 ETH. Not only that, but subsequent network upgrades will benefit L2 (off-chain) scaling solutions more than L1 (main chain). This will move most people away from ETH, making it more centralized and vulnerable agaisnt external attacks.
Instead of going all in ETH, I'd suggest you diversify between ETH and ETC for complete peace of mind. The latter is much more decentralized and cheaper to use for day-to-day payments. It's the original version of Ethereum after all. You'll never know when Ethereum (ETH) will fail, so it's best to prepare yourself for the worst. Just my thoughts