On Wednesday I've attended Warsaw IT Days (Warszawskie Dni Informatyki in polish). This time as a speaker :). It took me one year to jump back on stage :). I was giving a talk called "SOLID for Adults" as a part of DevTalk - Deep Dive track.
I'll not describe all the details, but here is the link to the presentation so everybody can have a look at what is it about.
In summary: SOLID is good when applied but make use of Occam's law (assume as less as possible and don't multiply abstractions) and don't overcomplicate things :)