1. we use rxjava in our code, is there a suitable replacement? Is the current version of flow MPP-compatible?

Coroutines?

coroutines and flow are not the same

Misread. Flow is mpp-compatible.

Flow should be MPP. For an RxJava alternative, there's https://github.com/badoo/Reaktive, that I heard about on KotlinConf. Not sure how big of a hassle it is to migrate from RxJava, though.

Reaktive has RxJava interop and operators named similarly to RxJava so it should be easy to pick i tup

Flow and coroutines are not multi-threaded in current versions but should be soon ish. Gave a talk about that https://twitter.com/kpgalligan/status/1202821639278399488?s=21