Depending on the quality of your backlink. 1 high authority backlink such as backlink from Wikipedia, Apple, Adobe, Mashable, TechCrunch better than thousand of low-quality backlinks. But it is not easy to get high authority backlink.
There is no limitation. You have more backlinks than your competitors you can do better.
Not only backlink but also quality content, site design, page loading time and more are important to increase Domain Authority.