>>_fat_s+le
Probably the fact that DHH introduced Solid Queue to Rails which can replace Sidekiq. Of course they're not going to say that, it'll be some excuse about his lukewarm European politics...
>>dismal+Af
I've formed a positive opinion of Parham's character by the way he's conducted himself over the years. And Solid Queue isn't a serious Sidekiq replacement for the types of high volume applications where you'd want a Sidekiq license; I doubt he even sees it as a threat.
>>jamesg+ZB
Do a Google search for Sidekiq DHH. First link is about migrating from Sidekiq to Solid Queue. Third result (for me anyway) is a Reddit thread where Perham talks about trying to make Basecamp a customer and that he wasn't able to...