There are lots of solidity developers. There are lots of solidity code. There are several tezos developers (LIGO, smartpy, michelson, etc together). There is limited codebase in tezos. If you want build something big you need 2-4 tezos developers. That’s problematic hire task. Also you need wait ~2 month until MVP ready. With this compiler tezos community can build apps faster. 90% of work is done by compiler, 10% is still up to tezos developer (because solidity and LIGO are different). And you need smaller team for MVP.
Also see https://vird.github.io/solidity2assemblyscript_online/near_rust.html It's solidity to Rust compiler. This one made for NEAR Protocol. But can be adopted for OASIS.
There are some likes from tezos community to compiler features announcements. https://twitter.com/Virdvip/status/1171334964203442177 https://twitter.com/Virdvip/status/1171504294115172352 https://twitter.com/Virdvip/status/1174639541011046400 Also note that SmartPy support added.