If Putin’s goal was to give NATO a fresh reason to exist then the invasion of Ukraine has already been a success. Through half a century of Cold War Sweden and Finland were fiercely resistant to the alliance. Things have changed.
Finland is publically renouncing their neutrality, clarifying that they are aligned, if not formally allied, with NATO. Joining NATO remains an option on the table.
Sweden is making plans to ramp up military spending. They are exploring the possibility of initiating NATO membership.
NATO is becoming fashionable again.