It probably isn't good enough. But it's hard for the audience to tell.

"Any questions?"

"How are we going to scale the data storage?"

"Oh, we're confident that the data will all fit in a single SQLite instance."

"Great."

It's only six months later, when it turns out it won't, and there's a lot of stress and panicked re-working, that the lack of preparation will be obvious. And by then, everyone will have forgotten the presentation.