This is a very important question. As Ben pointed out, the sensible direction for the system functionality for asset/value exchange is rather 2B or 2B2C. DEX is also ops heavy, as Luke mentioned. As such, it is unlikely to me that the ecosystem trading volume and activities will concentrate here (think of OTC / bulk trade vs CEX). Actually, I see this as unlocking more liquidity, since it will simplify things for many participants, and directing it to the DEXes in the ecosystem, with them sending offers to fulfil orders for instance.