Someone who wants to travel even lighter and takes a tripod and doesn’t need flash? Great, don’t need a beefy grip, viewfinder, or a hotshoe. Someone who mainly does video work and never uses those the features either?....great! Now they can pack much lighter and minimize their gear and workflow. Hopefully the price will also be inline and save money on unneeded features for those in that market as well.
'Pack much lighter'. I'm no fan of the EOS RP but it weighs under 100 grams more* than this thing and at least is usable in the normal camera fashion.
Sometimes just because you can do a thing doesn't mean that you should.
* the 495g RP weight includes card and battery, which Sigma sneakily omit from their 370g weight spec.