It depends on how you approach electronic instruments. The Elektrons (or similar gear) are instrument - computer hybrids. You can approach them like instruments (connect a Midi keyboard and play notes, sequencer stopped), like computers (program tracks in song mode, prepare all automations ‘offline’, then press play and listen to the machine’s performance) or anywhere in between.
I approach them very far but not 100% on the instrument side. This is most fun for me and fits the best to my intense piano etc. background in younger years.
My current workflow, where I prepare kits in advance but create all the ‘events’ on the fly, live record and loop some things, not others reminds me very much of a traditional instrument approach. On a piano you have a sustain and a dampener pedal and a lot of velocity-sensitive timbres at your finger tips. The sustain pedal holds notes so that it keeps playing even when you release your hands. A looper or live recorded sequence sustains your sound in a different way, which serves the very same purpose though. Mapping a lot of parameters to velocity and aftertouch on the Rytm is like changing screws on your traditional instruments or the angle with which a grand is opened. Etc. etc. traditional instruments also can have a technical side, you just usually don’t dig as deep into details but rather call a technician (violin specialist, piano tuner guy etc.).
Looks and sounds very different to traditional instruments, but has to be practiced and played. At the moment I see this on par or even one step ahead of touching a piano. If you just could customize the piano more 
I have to approach the machines like this, otherwise I wouldn’t have so much fun. The Elektrons are not the most spontanous devices so you have ro put some effort into it before they feel like instruments in the traditional sense.
Another comparison with traditional instruments: the church organ. You might argue that it’s an electronic instrument, and of course it is, but it’s very traditional as well. There is a whole science about how to press the keys, you get different types of sounds to choose from (wooden or metal pipes), no velocity, a rather standard amp/filter envelope (attack, release = 0, sustain = max) and you have to use these available things to play, say, a Bach Fugue as expressively as possible. You have to be very sensitive at how you press those keys (sostenuto and stuff) in order to achieve a ‘singing’ melody. I think that’s very close to playing a melody on a synth. Of course you can turn knobs on the synth that are not there on the church organ, but that just gives even more potential for a nice, musical outcome.
For me, there’s not much difference between electronic (not so much sequenced) music and traditional instruments. I think the gap is greater for people with a guitar, flute, violin etc. background, although there are also continuum instruments and guitars can get very electronic.
Interested to hear further thoughts.