wWolfw1Test on Nostr: Yeah I picked 50,000 as an arbitrary number. I don't see it being that realistic ...

Yeah I picked 50,000 as an arbitrary number. I don't see it being that realistic we'll just suddenly overnight have such a large number but regardless we can just x large number.

I know Exchanges can send to multiple outputs from 1 or more inputs. I've heard about Coinjoin/Wasabi but I haven't delved into it. Where can I find out more about this pooling of multiple transactions? 

I thought Coinjoin was purely just for privacy. I just watched a video I made a mistake of assuming all inputs need to be owned by the same person. I need to read about it more but I never heard of it saying it can help with scaling. 

50k ppl buy btc on exchange. They all want to withdraw, so 50k transactions are needed. Can you explain further on the 100 transactions or less.

I don't think there's anything wrong with current scaling solutions we have and will have in the future though as more interest builds. I just mean if overnight a major country just all switches to Bitcoin it's unrealistic to say it will handle well. 
It's good that we have time to slowly build with adoption.