I'm also considering an FX8 and this concerns me as well. I wonder if two factors are:FX8.... there's a thread on it. It's like there's not enough memory depending on how many effects you stack up.... or you'll get memory notifications. I don't know if it's been addressed or fixed, but that would suck
I have gone from pedals to FX8 about 10 days ago.
Before I had:
BS2 Buffer > Volume pedal > BJFE PGC > Tees Wah > Clusterfuzz > BJFE Honeybee > Buffalo Fx Evo > BJFE BPB > Effectrode Tubevibe > Foxrox TZF (original) stereo Out 1 - DMM > Strymon Dig > Ditto X2 > amp 1.
Stereo Out 2 (from TZF) Disaster Transport Sr > Strymon Dig > Ditto X2 > amp 2.
Now I have the FX8 with two expression pedals.
I have kept my treasured BJFEs (Honeybee, PGC, BPB) and vintage DMM (just in case!) and sold the rest.
I could not be happier. There are pros and cons to the two systems but I am completely astounded by the sounds and usability of the Fx8. It is of course different from my pedals in many ways (nothing else could sound like a Foxrox TZF!) but the pros dramatically outweigh the cons.
My board is a fraction of its former size and silent. I have so many sounds available and it is far easier to use than the massive array of pedals.
I have of course saved some badly needed cash as well. This partly inspired the move as I spent far to much on a LP Goldtop and BK Nantucket p90s to go in it (stonking guitar!). But I really wasn't sure and didn't start selling my pedals until I spent many hours on it with my amps.
I am also finding FX8 really inspiring. I am such a cork sniffer when it comes to tones and I have had many hundreds of pedals over the years including most of the ones availabe from the likes of Cornish and Toneczar, but I think getting the FX8 was the best thing I have ever done. Maybe my feelings will change in time but I very, very much doubt it.
My main concern other than sounds is how easy is it to edit on the fly, on stage in the heat of battle? How many steps more than "just bend down and turn the knob" like on a regular pedal?