Not really, you'd still have a problem of building with possibly conflicting system dependencies, packaging (a dev team that can build its own .debs or .rpms is

Not really, you'd still have a problem of building with possibly conflicting system dependencies, packaging (a dev team that can build its own .debs or .rpms is a rarity), ease of deployment / distribution, and running multiple instances. Developers don't want to deal with that crap.