So, if you understand the term sunk cost… that is your CD collection. Mine is now used for wall sound dampening. So, instead of investing more in a transport, better to invest in the highest quality streamer.
I like having and will keep my software (CDs)... the vinyl folks love owning their media and CDs are the same, just smaller and shinier! I have ripped 600+ CDs to my Small Green Computer Sonictransporter Roon server, and now I stream them. I haven’t fired up my good CD player in months, but I will keep it. I still buy CDs but I rip them straight away. I do love having the discs in my listening room as a fallback source. I can’t think of a reason to spend $1000-4000 on a CD player now, when server replay is so good (I have heard that the T+A and other high-end players are amazing though).
I'm reading reviews of top end streaming gear and DACs getting truly amazing playback from standard Redbook CDs. I don't hear much if any difference between most of my CD rips and MQA or Qobuz hi-res streams, but my system is "only" an $11k system, so not the highest resolution. My 64 year old ears aren't the highest resolving anymore either, to my dismay.