In response to - "Should I get a late 90s CD player or something current?"
A late 90’s cd player is too old.
There has been many improvements in audio engineering during all this time (thats more than 2 decades). New improved components - lasers, servo and DAC, low noise, power efficiency, more features etc. Plus, the engineers also have acquired new knowledge and skills have access to better tools that was not available before. Also, components like capacitor have a lifespan (5-20yrs), cd players with this old components will eventually die sooner rather than later.
Misinformation being spread in youtube and internet by non-engineering hifi influencers that you can just get any cd or bluray players to play or rip your cds.
Contrary to this, CD players are not the same. Good well designed cd players are able to extract more information from the disc.
There are many factors why some CD players are trash. Quality of the laser, control of vibration and power all contributes to a well designed player (other factors- jitter, error correction, many more). This is the reason why some cd players are able to produce a little bit more detail and resolution while others cannot. It’s more obvious in the highend if you listen closely. A good cd player is able to produce those reverb trails, clarity and detail that is otherwise lost in poorly designed cd player.
Then finally, a good DAC (internal/external) influence the overall sound.
But if you are just building an average sound system and not a hifi system, by all means buy just anything. What is important is that you enjoy the music.