You can have a planned economy that encompasses "niche" consumer products too. Regardless that nowadays most "niche" things scale up in consumption really quick thanks to quick logistics. Something being niche doesn't mean it shouldn't be produced.

Also, you can have systems where the state controls the big and medium levers of economy (energy, grains (wheat/corn/soy/etc), healthcare, housing, education) through different kinds of state organisms/"enterprises", while the small scale production, say fresh-bread bakeries is handled by small coops.