Necro thread, but ok.

I like the thumb safety. It is why I bought a Shield instead of a Glock 19. If Glock had a safety, I'd have bought it.

With CCW, there is SO much administrative handling, it seems orders of magnitude higher risk to have an ND from that, than the vanishing small risk of not releasing the safety if and when the SHTF. I practice so much with it that I actually have a small callous on my thumb from it!

My M&P22, Sig P238, and my Ruger SR9C also have thumb safeties.