[Klathmon]

It might not be more difficult, hell it is probably easier for each individual platform, but even if each one is 20% quicker than a web based one, all together you would end up spending 240% as much.

Plus then there is ongoing maintence costs, probably a ton more documentation costs (unless they all look and act the same), more coordination needed with new features to ensure parity, and more bugs and security issue surface area.

That's not a trade-off I'd want to make unless it was required for some other reasons.