Have you moved from tubed amplification to solid state amplification... Why?

Switched to SS because 1. I'm a worrier. Got tired of wondering if it's time to change the tubes before they explode or some other catastrophe. 2. Tubes, IMO, tend to homogenize whatever you play through them. SS is better at textures and dynamics. 3. The expense every two years.
My preamp does have tubes. I may try some of the newer SS preamp designs in the future (Pass, BAT, etc.).

I swore I would never own tubes because of the "hassle and expense."  Well, I graduated from Adcom GFA555 II's to a Conrad Johnson MF2550 SE, which sounded great (along with my CJ ET5 preamp).  Then I took a chance on a used pair of CJ monoblocks and they just sound better.  Somewhere between nominally better and noticeably better.  More fluid, and more musical, although the CJ Solid state amp sounded pretty good in its own right, and had marginally better damping for the bass.  I kept the solid state for my b system, but for the a system, it's CJ tube monoblocks and the now discontinued ET5 preamp.   I have toasted a couple of KT120 tubes, but they are only $50 each from upscale, and I have put in a nice Telefunken 6922 in the ET5 from Brent Jessie in Illinois.  They are all approaching a year old and they still sound great and I play music 2 hours a night about 3 nights per week.  So, I am really no longer concerned about the cost of tube replacement, but I do stock several pairs of KT120's and some 6922 tubes.

Advice/lessons learned?  If you want great sound you have to have a great source.  So, I needed to upgrade my Rega Rp6 with MM Exact 2 cartridge to the RP10 with the Apheta II mc cartridge to bring that out. 

Now, I am really pleased with the sound; symphony, Peter Gabriel, Eric Clapton Live, Mozart Piano Concerto's-- all good.  If I was to go back to solid state, I would buy Pass Labs gear-- a combination of used on audiogon and new from Mark at Reno HiFi.

I am not related to any of these vendors; they are just folks who have really treated me well over time.

Cheers

Question: What are you using? Please elaborate.  I have both tubes; a Conrad Johnson Classic 120SE and Conrad Johnson MF2500A (SS) and Conrad Johnson Premier 350SA; and Conrad Johnson ET-7 (Hybrid,Tube). Why both, because I can't get away from how amazing tubes sound and the CJ (SS) amps I have sound extremely good and even tube'ish.  I got away from tubes due to maintenance, but in the end, the sound of tubes call me back. End of Story. It's no more work if you just learn to deal with each. You must experience it for yourself to decide. We here can not help you but good luck. Tubes from a great company like Conrad Johnson are "FANTASTIC", and tubes from a not so great company "SUCK". Even early AR tubes are so hard to deal with I'd pay a dentist to drill my teeth (biasing sucks on early stuff, no offense to those who like the early stuff or have it; personally like AR's sound as well but not as much as CJ. 

I’ve got an all tube system and an all ss system. My tube system is all of the vintage kind ( altec model 19s, Sansui 1000a, Grant fidelity tube dac 11, pioneer pl-630 turntable).  My ss system is diapason adamante 3’s with a pass int 60. 
Both are awesome but very different sounding. The ss is much more 3D and transparent while the tube is more dynamic and lush. The tubes require attention but not as much as you think. You will notice a difference when they need replacement. Its hard to say which I prefer. I enjoy the difference every time I switch rooms. Keeps my adhd in line. 

I run Quad ESL's. They need protection from high voltage spikes. The protection circuits sound like hell (it's relative).

What to do? The obvious thing is to optimize and upgrade the Quads' circuitry, run low voltage SS amps, and remove the protection circuits. That is, engineer the system as a whole. So I read a lot and sought expert advice. Thus DIY. The results are full complementary push-pull SS amps that run on +/- 25 V rails.

The phono/pre proceeds from different requirements. Most importantly, no (as in zero) ripple voltage, hence batteries. SS is easily done this way, tubes not so much.  And Analogue Devices was still selling its legendary PNP / NPN aerospace matched dual transistors (MATxy). Hence a full complementary push-pull circuit.

Another advantage of SS is that it can remain powered up indefinitely, improving for several days after a shutdown. Dead stable, dead quiet, exquisite refinement, superb dynamics, no maintenance. And no remote possibility of frying the Quads.

It may be that there are some amps which sound better than mine, there may be preamps that sound better than mine, but I'll bet there are damn few systems that sound better than mine. And I couldn't do that with tubes.