Hi,
Today upgraded my old, trustworthy RPi 2 to new shiny RPi 3B+. Haven't installed it from scratch but just swapped SD to new Pi (tweaking config txt a bit) and everything seems to be working perfectly. It's unbelievable how much faster it is - Netflix 720p is now not a problem at all.
I have one problem however - LE still reports an old SOC from RPi2. Don't know if I should tweak something or simple not worry with it, but I'm afraid that my system might not use all fetures of new SOC.