There is nothing new under the sun, despite everything being new. As you start going to more meetings and less debug sessions, you will naturally become less conversant with specific technologies but hopefully, your years in the trenches will have left you with the ability to adjudicate between different approaches.
It is essential that you have senior engineers who are capable of keeping up with the details of the relevant technologies and be able to articulate their relative merits. Better still to have two such seniors who don't agree with each other on anything. Couple that with everyone's understanding that there may not be a technical superiority of approach A over B but that either A or B is preferable to some hybrid bastardization and A or B may have their pet proposal pushed aside.
Take - for example - the anti-relational nature of current NoSQL data stores. When I say there is nothing new under the sun, a datastore is still a datastore. However, you shouldn't try to cast it into third-normal form. Can you, should you, become an expert at NoSQL? Perhaps you actually can not, but you can certainly become conversant to the relevant aspects of the technology such that you can make informed decisions about its application and be right.