Ill start by saying I absolutely love my PrimeGo! It serves well within the limitations i have space wise on a 4ft section of an 8ft table which I share with our live stream crew. I wish i could have gotten the Prime 2 or even the Prime 4 but sadly theres just not that kinda space! I use my current PrimeGo to provide music for our college club ice hockey team’s home games. What i would absolutely go purchase a PrimeGo+ for is the addition of the built in SSD slot being added from the other Prime hardware. I have a lot of music and would like a more “permanent” storage device internally like an SSD. I love the portability of having the battery to prep stuff literally anywhere i just need bigger then SD card level storage so i dont have to pick and choose which tracks i bring! What i cannot do on a plane is setup my laptop and the PrimeGO 
The original Go should really have had this IMO along with another couple of USB ports. However its not really needed, just grab yourself a decent make NVME SSD and stick it in a USB 3 enclosure works a treat and easy to unplug and use in other Prime devices or PC
Great solution if you want to bring a bunch of other stuff with you to attach to a “standalone”! Why is this what everyone says to this idea? The whole point of a standalone is for it to standALONE! Like the whole purpose is to bring it in and not require a bag full of other things like multiple thumb drives, external storage, etc. Nothing should have to be attached “mid-flight” for me to prep tracks other then my headphones1
wow calm down, just buy something like this then and leave it in the USB port:
I don’t need to “calm down” because im not upset! You need to be more receptive to feedback you disagree with. You may have a more limited music collection, I have well over a TB of music! If you think a USB flash drive can cover this need then thats a great solution for you! You need to be realistic to what you are suggesting! A standalone controller that i have to attach drives, dongles, etc to defeats the purpose. Yes i could attach these things and “make it work”, but i shouldn’t have to! So the idea in your response that it’s “not really needed” because i can just have an external SSD hooked up is a ridiculous and irrelevant to what im suggesting.
ok have fun waiting for your Prime Go+ 
PrimeGo+ with NVME slot + newer RK chip.
That would be deadly
YAS!! My thoughts EXACTLY!