Is there anyone who came back from tubes to SS?

I've been there but not back. ;-) Someone commented about tube hiss and high pitched tone. The slight background hiss is normal for a tube preamp but not the high pitched tone. That indicates to me that one of the tubes is oscillating and needs to be replaced or something else went south in the preamp. I had this happen to me in a CJ PV-12 preamp and replacing the bad tube cured the problem. As for hiss, I've owned three different tube preamps and they all hiss slightly but only noticeable if I place my ear right up to the tweeter. My Adcom GFP-750 preamp is very quiet in the background like most modern ss preamps but it doesn't have the soundstage, air, or transparency of the tube preamps that I have owned.

Currently using ARC LS16 tube preamp in combo with CJ Premier 11a tube amp driving the smallish Thiel CS 1.5 speakers. Previously owned Classe CA-200 ss amp. Good amp with more bass slam but wanted that "tube magic" so I sold it.

Tube gear can be microphonic and more sensitive to vibration but I just (now) did a test on my ARC LS16 tube preamp and CJ Premier 11a tube amp.

I switched the preamp to an input that didn't have a source component connected to it, turned the volume control almost completely open 3 O'clock position. I then tapped my knuckles around the LS16 tube preamp then on each side of the Premier 11a tube amp and the top of the amp near the tubes.

No "boiiing" sounds or other indications of microphonics AT ALL. No sounds coming from the speakers, i.e. can't hear the sound of my knuckles tapping on the gear thru the speakers.

In response to snook2:
There are a number of outstanding and RELIABLE tube amps out there that don't require constant biasing and tube replacement. I'm not saying your gear was bad but if you stick with reputable quality brands with solid construction, I think you're in for a life time of reliable operation. I own Conrad-Johnson and Audio Research. Both companies have been around for a couple decades and didn't just recently jump on the vacuum tube bandwagon because they thought it was cool. I bias my amps maybe twice a year and the tubes only need replacing every couple years if I listen frequently. No "reliability problems" here.