Yeah, for sure. We’re already prototyping a game using Unity.
As fun as coding an engine from scratch is to me personally.. from a business point of view it makes more sense to pay a few shekels for Unity and have a ready to work with engine. A lot more sense for us than working on an engine for 2 years – instead of a game.
You obviously are more limited in a lot of ways. We have come up against things that we had to complain about, or work around. Not everything works how you want or expect it to.
In the long run the pros (existing toolset, multi-platform, proven) overcome the cons (limits, ego). And we’re trying to be in the business of making games, not engines.