Because of the content lock-in and issues with Divi updates, it's really hard to recommend Divi if rock-solid reliability is important to you. Now if you want to use an innovative page builder for design, that keeps pushing the envelope, then Divi is the best choice here. Beaver Builder is the most reliable page builder available, if you make websites for clients, you don't have to worry when an update is released, but if you want a pretty website you will need custom CSS or an add-on package. As far as cost goes, you can't come close to Divi's lifetime pricing. So for me, I am going to give Beaver Builder the edge here, but I will say that the lifetime pricing option with Divi is very enticing.