Over my 40 years into this hobby, I can count with one hand on how many instances of spectacular progress that had happened with my system. The first was 25+ years ago when I chose a pair of Silverline Monte Cristal speakers over Wilsons and a couple others ($50k range). Very few probably heard of them because they were made by a boutique company, and there were only five pairs ever existed. Anyway, they transformed my audio system that we have enjoyed ever since. The 2nd one happened four years ago when I replaced all components (Wadia 20/21 and BAT 5Ki/150M) with PSA MK1, PST, BHK pre, M1200, and P15 all around the same time. The improvement of the sound could only be described as spectacular, and it re-ignited my passion for this hobby (and jumped into the rabbit hole).
Then three miracles have happened all within 2024. The first was FR30 replacing Silverline MC, the 2nd was Grimm MU2 replacing Lumin U2, and the newest one is adding Gryphon PowerZone into the system.
I am getting closer to my endgame system, but one never knows.