Software engineers tend to follow demand, with some lagtime. Since crypto goes through these manic bull/bear cycles, demand dramatically spikes and falls. Hard to make a career change when the next bear cycle can wipe out your prospects. As crypto stabilizes, there should be a wave of immigration into web3 engineering. You can already kind of see who these engineers will be, they're often the web2 developers who just happen to be working on web3 projects (and don't know solidity)