Author of the post here. This talk was one of the talks I watched when learning about allocators. I thought about writing a part of the post about this talk but I didn't have much time.

So when people retool their application to use GC do they say "See you later, allocator!"?

...I'll be here all week. Try the veal!

It’s actually without GC that you have to see the allocator again later, to free the memory.