It depends on your personal taste.
I have outboard effects myself - couple of analog delay pedals, couple of fuzz pedals, and an overdrive pedal. I’m not a chorus person so I can’t comment on the chorus effect in the OT.
There are things that are done on analog delays that are difficult or not possible to do with the OT’s delay - things like cranking the repeat to induce oscillation, pitch shift induced by tweaking delay time, etc. Not everything I do with delay needs to be synced with the OT. That’s why I and other OT users have outboard delays.
Regarding fuzz and overdrive - I play guitar, among other things, so I get why the distortion in the OT’s LoFi Collection effect might not be everyone’s cup of tea. I do enjoy using LoFi, however, because I like the ring mod as well as its distortion.
I love the OT’s filter and dark reverb.