[mperham]

This is utterly false in my experience. The popularity of Puma and Sidekiq mean that threading issues are quickly found and fixed.

[dalyons]

Yeah I agree. Thread safety in ruby is a non issue these days. Maybe this is 10 years out of date experience?

[pdhborges]

How does Puma help with the libraries that are not thread safe?

[sparker72678]

I think he's saying threading issues are more likely to be found and fixed these days given the context in which most ruby libraries are running.