Advantages of a tube CD player over an SS player?

I agree with comments that a 'tube' CD player simply adds a tubed buffer stage.
Now all the tube parts costs money, the extra parts and a better transformer for the tube B+ voltage etc.
So the tubed CD player should have to cost more money for equal sound (in theory the added tubes stuff should jack up the price by $300 to $1000 for an 'equal' CD player)
I opted for a separate 'tubed' stage and bought a used VAC Standard four tube preamp for $1500 to use as my 'tube buffer'. Worked out great. And I can use it with an assortment of digital gear. Not stuck in just one CD player!
(I tried a cheap tube buffer which was worthless IMO, Where in comparison the VAC is really a great device)

All things being equal, and they never are, especially the DAC chip, tubes should sound better.

Charles1dad said it all. There is nothing to add, except you buy brain. Can be good, can be inferior. That means you should know what you want . Otherwise you can also roll a dice.

No advantage.

I have owned an Ayon CD1s --- not the 07... and it is a fine sounding, rich, lively CD player well worth the used price.