In practice both major runtimes have long-term stability guarantees (e.g. tokio has committed to maintained 1.0 for at least 5 years), so if you use libraries c

In practice both major runtimes have long-term stability guarantees (e.g. tokio has committed to maintained 1.0 for at least 5 years), so if you use libraries compatible with Tokio 1.0 then you're unlikely to have issues with this for some time.