Projects and investors might have to find an alternative to the ethereum blockchain. But this will not happen in a short span of time, it will take years. There are a lot of blockchains out there which offers better speed and lower fees.
Ethereum 2.0 will make the network scalable, and therefore decreasing the transaction fees in the long run. So this should not fail. There will be delays but I'm confident that the protocol will give much more room for growth.
Yes, I joined crypto with the Ethereum, not Bitcoin, because I liked it more, it was newer, faster, cheaper, but nowadays I shifted to the TRON, because I simply don't want to spend 2-10$ when I need to send 10$ to someone. Although I haven't followed the TRON since it was launched, I switched to it because of lower commissions and higher speed. However, when the ETH 2.0 is released, I'll gladly return to the ETH network.
I have been using TRON for a long time, but I had to say goodbye to this coin due to constant strong price fluctuations. This was primarily due to the behavior of the founder of this coin. I don't like it when people lead like clowns, especially when it negatively affects the people who depend on them. Of course, the commissions of the Ethereum network are very upsetting, but I have high hopes that the new Ethereum network will be launched in November.