Yes, I know what you're saying but I'm far from convinced that a multi-fx unit can't work. Obviously individual pedals are better but are they better by a big enough margin to warrant all of the extra expense? I seriously doubt it quite frankly. If it was just me listening then possibly but I'm needing a rig to use at home and at gigs and the reality is that at a gig (for me at least) the difference is unlikely to ever be noticed. Consider what I used to use compared to what I use now, even before getting a better multi-fx unit.
Overdrive
I used to use a Hardwire unit, which was very good and better than the multi-fx options but the multi-fx is OK and has the advantage that I can keep tweaking the settings and the type of overdrive used to suit the song without having to mess around with the controls on just one pedal every few songs. The sound was better on the Hardwire but the convenience and flexibility of a multi-fx is far superior and in a covers band like mine, I need that versatility. A different multi-fx may be better again or I could always add an individual overdrive to the multi-fx if I really needed to.
Distortion
I used to use a Hardwire Metal Distortion pedal into the clean channel for some songs and it was fantastic. In comparison the distortions on the Digitech are awful so I just add a bit more gain to an overdrive into the dirty channel and it's fine. TBH, if I was going to use a full distortion unit for my drive, I'd be tempted with the Nova System instead because that is analog. Again, the individual pedal is better but that was a £100 pedal and the multi-fx does a perfectly reasonable job the way I use it for a fraction of the price and far less space on a cramped stage.
Wah
The Wah on the RP1000 is OK. It's not even remotely close to as good as my old Tremonti Wah but again, I just don't see it as being worth all that extra cash (unless I used a Nova System, which doesn't have a Wah) when the vast majority of the audience can barely tell if you're playing the right chord or not!
Chorus/Delay
Again, I used to use Hardwire pedals but, although they're excellent, I frankly prefer the multi-fx here. I use delay especially quite a lot and I love the fact that I can use a different setting on each song if I want to, without any messing around. What's more, despite the Hardwire Delay being generally seen as excellent, the Delay and Chorus on the RP1000 are more than adequate and I'm perfectly happy with them.
Noise Gate
OK, the ISP Decimator I used to have was a LOT better but that was a very expensive pedal and I figure that if I can cope with the poor noise gate on the RP1000, I should be perfectly happy with whatever is on a better unit.
I do appreciate the argument for individual pedals and accept that they're better but for what I need and in the band I play in, multi-fx are simply a better option. I've simply got to a stage where I'll sacrifice ultimate tone for convenience. I want to get something better than the RP1000 for effects but I have no intention at all of going back to individual pedals.