I agree. However I doubt it'll be long lived. Twitter gives up on features all the time (fleets, I doubt spaces will be around in a year). They'll try this out and abandon it like most of their experiments.
My guess is that this is an attempt to replace long threads (1/n), but those have their own place and mechanics and I don't see how getting people to write Twitter Notes is in any way a 1:1 replacement or improvement for that.
Time will tell.