It’s hard to get this line 
My old Pi2 updated on Wednesday and I got my new Pi3B+ on Friday. I swapped the card into the new Pi. It booted fine and works flawlessly with no issues at all.
Well done Sam!
The Pi2 case however took 2 hours with the old Dremel to cut holes for the new GPIO pins and the taller CPU with its heat cap. I should have bought a new case but I’m too mean.
I know, I like the guys from raspberrypi.org they are ready to change everything to get forward, making the pi better with every version cut ties where ever, but on the other hand jippy new Pi damn I need a new Case a new power supply I need what ever new…
Hi,
The 3B+ fits in the pi3 case and the 2.5a power supply which was recommended for the pi3, meets the spec for the 3b+
Thanks Tom.
I know, but the POE are new, and RUN is moved
New RPi3B+ arrived today, swapped into old Pi 3 case fine, booted up using the March update and all is working fine, just a little faster!