I've had the opposite experience. I've worked at several companies that migrated from Go to Elixir because the return on investment DID justify the effort. For example, Elixir allows us to do hot code deployments, uses a tweezer approach to self-healing as opposed to Go's sledgehammer approach (when paired with K8s, otherwise Go can't self-heal at all), and Elixir's immutability makes concurrency less error prone than Go's imperative nature.
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I've had the opposite experience. I've worked at several companies that migrated from Go to Elixir because the return on investment DID justify the effort. For example, Elixir allows us to do hot code deployments, uses a tweezer approach to self-healing as opposed to Go's sledgehammer approach (when paired with K8s, otherwise Go can't self-heal at all), and Elixir's immutability makes concurrency less error prone than Go's imperative nature.