On a serious side, it may be because there is currently no cryptocurrency behind or using it(?) despite the fact it's one of the most used DLT. Correct me if I'm wrong but currently, only large corporations like Google, Amazon, and co are making use of it, even some banks, so perhaps not the right audience here?
^ This is the biggest reason, most people come to this forum to talk about their Bitcoin and shitcoin investments. So often, even if people try to have technical discussion, it's not because they're that interested in tech, they just want to know if the coin that they hold is actually useful.
So I'm still wondering why people are not using this superior technology. is it too expensive? I'm not sure technical expertise would be an issue on here, but there must be something.
It's not superior, it's different. Hyperledger is permissioned blockchain framework, so naturally only companies would be interested in it. Ethereum is permisionless and open, so it's more useful for building something censorship resistant. And even big companies are interested in Ethereum if they want to have some public open-source product.
Also, Fabric is just one product, Hyperledger also has others, like for example Hyperledger Besu, which is an Ethereum client for permissioned blockchain development. So, Hyperledger isn't really a direct competitor of Ethereum.
