I get the argument, but the counterargument is pretty strong.
I can pay for things in dollars and I can pay for things in cents. So having both worlds makes everyday sense. Nobody will ever pay for anything with Bitcoin. Every advertisement you see for any product will give the price in Sats. “For a limited time only 55k Sats, buy now!”. TV, podcasts, Youtube, flyers, all Sats. Sats, Sats, Sats. Every label at every store will be in Sats.
The word Bitcoin will become like the word "Bullion", reserved for certain corners of Wall Street only. There will a transition period where some people say "Bitcoin Sats", but that will end. After it'll just be Sats. People will pay attention to the “price of Sats”. People won’t “come to Bitcoin” as you said, that phrase will not enter common usage because. The word Bitcoin will not be tied to anything people see and touch. Only the word Sats will be. It'll take over.
The young generation will grow up never using the word Bitcoin in their online chats but only using the word Sats (What semantic value would ever make the word Bitcoin come up?) Many will have no idea that Sats started off as Bitcoin, that’ll be something the professor informs them in economics 101.
Adding to the mess, after all these years we have no symbol for Sats. And there’s no indication that 10 more years will result in a unicode symbol. Or any agreed symbol at all. Or any coordination on when to say Satoshis and when to say Sats. Or whether it's Milli-sats or nano-Bitcoin?
So what will be have accomplished? We’ll have completely overwritten the Bitcoin brand in the context of everyday life—the most important context of all—with something that doesn’t carry any overt connection to the old brand and doesn’t even have a unicode symbol. If that’s the rebrand you want then all power to you, but you have to acknowledge it is an all-encompassing rebrand.
