[maciejpirog]

Only to a certain extent. The question is not only if something is possible, but also what the most convenient way to express it is. Effect handlers do have some interesting ideas for programmer-level interface, like user-defined typed commands and dynamic pairing of commands with handlers. In this sense, C++20 coroutines or Boost Context are lower-level, and maybe not the most convenient building blocks for implementing complicated concurrency scenarios, yet alone effects that do not look like concurrency at first sight, like exceptions or different forms of mutable state.