While I think modular.im is a good idea for the Matrix devs to hopefully be able to sustain development, getting more third-party hosts should be the name of the game.
And while I love the Matrix.org folks and all the work they've been doing, the recent hack was such a complete shit-show (with so many glaringly bad decisions). This was likely the result of nowhere near enough resources to dedicate to infrastructure, so maintaining thousands of clients' infrastructure as well would be a very bad decision.
Personally, there's no way I would use them for hosting if I was planning on not using matrix.org anyway.