I think the idea that giving the analog elektrons midi sequencer would kill some sales of their other machines is quite absurd, if that is what Elektron really thinks. The monomachine, machinedrum and octatrack all had midi sequencers yet many of us here had them all three at the same time. Same would happen with the new analog line.
These machines are supposed to be used for live performance. No midi sequencing is a huge flaw in that context, and these are not cheap machines.
Because many synths (most of them) don’t have a midi sequencer incorporated. Elektron machines have a focus on live performance. No midi sequencer means you can’t pair the rytm/ak/a4 with a virus, nordlead, etc… without another external sequencer. Even cheapo electribes had midi out, and it’s not an alien function to the machine since it already has an internal sequencing engine. In a live context you like to keep your setup as slim and as control concentrated as possible.
It’s really quite obvious why anybody would want midi sequencer: to midi sequence external gear.