Started with class a/b SS, moved on to class a SS, then to push pull tubes, next to SET. My experience with tubes and reliability is the higher the output the more heat and issues with reliability, heat not good for reliability. I still dabble with ss from time to time, purchased Pass XP22 pre and while it was nice not quite there in my setup.
As much as this is about tubes vs ss, speaker, amp interface is the final arbiter equipment wise, the right tool for the job. Beyond that its listener preference, I've always enjoyed the added texture and color tubes (2nd order harmonics) bring to the presentation. Also prefer the way tubes sound stage and image, slightly less defined image outlines.
Having said this, I've heard quite compelling presentations from both tube and ss systems, if I had the funds and room I'd have at least two reference systems, or perhaps three or four or five or whatever.