At some stage, you're right that components may end being the last upgrade.
I'm working towards that myself. Have speakers, DDC, Dac, streamer, RCAs, power cables, digital cable, speaker cables sorted.
If no chance to upgrade LPS, external clock and amp, I'm fine with what I've got, and fine with the sound. Having been in this game for 46 years, I know I want to upgrade those as well.