I have never really had the idea of end game. I would go through an upgrade cycle about every seven years and reach as higher a level as possible. It wasn’t until near retirement I thought I should upgrade one last time before retiring. Which I did. But a couple years after retiring I was fortunate enough to upgrade again, doubling my investment and enormously improving the sound. I am very happy.
Will I upgrade again? I don’t know. Ask me in five years… if I’m still kicking.