Anyone permanently convert from tubes to SS?

It all depends on the application, synergy and preferances.
The goal is your satisfaction, not the trends to follow.
IMHO - tube amps are more flexiable and easier to build. Good sounding SS amp is extremly difficult to design and work properly.
Those that succided are usually very expensive.
I find tube amps easier to fine-tune by mods and tube rolling.
But that is just me. YMMV.
Owned some nice SS amps in the past but it had more to do with matching my ML speakers then anything else. Macs were probably my favorite SS for the money.

Cheers
Mariusz

Yes, for my preamplifier, as I went from tubed units by Counterpoint and ARC, and went with the solid state Ayre K-1xe. (I have noticed that Ayre has been mentioned a few times in this thread.)

And a qualified Yes for my amps, although that depends on whether you count a one tube hybrid to be solid state (i.e. my Lamm M2.1 monoblock amps). Most people seem to catagorize this amp as a solid state amp, including Stereophile magazine.

I am the usual SS to Tube person, with a slight twist. I found that my 50 wpc McIntosh 2505 works best with my ultra sensitive Klipsch La Scalas. There is fantastic synergy between the two brands.
The stated sensitivity is seems to be true. The Klipsch are very very easy to drive to ear spliting spls with low power. When I picked them up the previous owner was using 2A3 amps with all of 3wpc, they were loud and I know loud. They seem an obvious choice for flea power tube amps. The only thing is that the bigger the SS Mac the better they sound. The speakers have infinitely better tonal balance with SS the Klipsch "MIA bass" finally shows up. The Macs simply spank the tube amps I have tried with them.

For a few years I had parallel systems (VTL/CJ) but finally sold the tubes for reasons of practicality, not better sound. If I had unlimited funds, I would still have both.